Test Bank For Physics: Principles with Applications, 6th Edition

Contents Preface Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Chapter 8 Chapter 9 Chapter 10 Chapter 11 Chapter 12 Chapter 13 Chapter 14 Chapter 15 Chapter 16 Chapter 17 Chapter 18 Chapter 19 Chapter 20 Chapter 21 Chapter 22 Chapter 23 Chapter 24 Chapter 25 Chapter 26 Chapter 27 Chapter 28 Chapter 29 Chapter 30 Chapter 31 Chapter 32 Chapter 33 Introduction, Measurement, Estimating Describing Motion: Kinematics in One Dimension Kinematics in Two Dimensions; Vectors Dynamics: Newton’s Laws of Motion Circular Motion; Gravitation Work and Energy Linear Momentum Rotational Motion Static Equilibrium; Elasticity and Fracture Fluids Vibrations and Waves Sound Temperature and Kinetic Theory Heat The Laws of Thermodynamics Electric Charge and Electric Field Electric Potential Electric Currents DC Circuits Magnetism Electromagnetic Induction and Faraday’s Law Electromagnetic Waves Light: Geometric Optics The Wave Nature of Light Optical Instruments Special Theory of Relativity Early Quantum Theory and Models of the Atom Quantum Mechanics of Atoms Molecules and Solids Nuclear Physics and Radioactivity Nuclear Energy; Effects and Uses of Radiation Elementary Particles Astrophysics and Cosmology v 1 17 41 59 82 104 127 148 168 180 199 224 245 266 285 303 324 342 360 387 407 440 448 477 499 512 526 542 554 560 576 586 597 Test Item File to accompany Physics: Principles with Applications Sixth Edition Douglas Giancoli Delena Bell Gatch Georgia Southern University Preface This test bank is a revision and update of the Test Item File accompanying the fifth edition of Douglas Giancoli’s Physics: Principles with Applications. The sixth edition test bank was created with TestGenerator, a networkable program for creating quizzes and exams. TestGenerator allows users to modify existing questions/problems, including algorithmic versions, as well as create and input new questions/problems. This test bank contains approximately 2500 multiple choice, short answer, and essay questions. The majority of the multiple choice questions and problems could also be given as free response questions or problems. Like the end of chapter of Physics: Principles with Applications, each chapter of the test bank is divided into two sections: Conceptual Questions and Quantitative Problems. Thus, nearly 50% of the material in the test bank is conceptual in nature. All questions and problems are ranked by level of difficulty and are referenced to the corresponding section in the textbook. The notation in the sixth edition test bank has been updated to reflect the notation used in the sixth edition of Physics: Principles with Applications. About the Author Dr. Delena Bell Gatch has taught introductory physics at Georgia Southern University since early 2001. She completed her Ph.D. at the University of Georgia in September of 2000, and remained at the University of Georgia as a post doctorial assistant before accepting the assistant professor position Georgia Southern University. Her field of specialty is experimental condensed matter physics. Her research ventures have included the study of the properties of powder phosphors for flat panel displays, the development of new infrared detection schemes utilizing visible emission from crystals, and the investigation of the shifts in energy levels of crystals due to the application of hydrostatic pressure. During a typical semester, Dr. Gatch teaches three or four introductory physics classes, in addition to one-to-three introductory physics labs. She works with students in the University Honors Program who desire to study physics in greater depth. She also spends time outside of the classroom assisting her premedical students who are preparing to take the MCAT. Chapter 1 Introduction, Measurement, Estimating Conceptual Questions 1) Four students measure the mass of an object, each using a different scale. They record their results as follows: Student Mass (g ) A 49.06 B 49 C 50 D 49.2 Which student used the least precise scale? A) A B) B C) C D) D Answer: C Diff: 1 Page Ref: Sec. 1.4 2) Four students measure the mass of an object, each using a different scale. They record their results as follows: Student Mass (g ) A 49.06 B 49 C 50 D 49.2 Which student used the most precise scale? A) A B) B C) C D) D Answer: A Diff: 1 Page Ref: Sec. 1.4 3) A useful method of expressing very small or very large numbers is A) scientific notation. B) arabic numerals. C) the metric system. D) roman numerals. Answer: A Diff: 1 Page Ref: Sec. 1.4 1 Chapter 1: Introduction, Measurement, Estimating 4) All of the following are base units of the SI system except: A) kilogram. B) kelvin. C) meter. D) volt. Answer: D Diff: 1 Page Ref: Sec. 15-1.6 5) Select the list which contains only SI basic units. A) liter, meter, second, watt B) joule, kelvin, kilogram, watt C) candela, kelvin, meter, second D) joule, newton, second, watt Answer: C Diff: 1 Page Ref: Sec. 1.5-1.6 6) How many basic units does the SI system have? A) four B) five C) seven D) ten Answer: C Diff: 1 Page Ref: Sec. 1.5-1.6 7) The base SI unit of time is A) hour. B) minute. C) second. D) millisecond. Answer: C Diff: 1 Page Ref: Sec. 1.5-1.6 8) In the CGS system, what are the fundamental units? A) Newton, centimeter, second B) kilogram, meter, second C) gram, centimeter, minute D) gram, centimeter, second Answer: D Diff: 2 Page Ref: Sec. 1.5-1.6 2 Physics: Principles with Applications, Sixth Edition 9) The metric prefix for one one-thousandth is A) milli. B) centi. C) kilo. D) mega. Answer: A Diff: 1 Page Ref: Sec. 1.5-1.6 10) The metric prefix for one one-hundredth is A) milli. B) centi. C) kilo. D) mega. Answer: B Diff: 1 Page Ref: Sec. 1.5-1.6 11) The metric prefix for one thousand is A) milli. B) centi. C) kilo. D) mega. Answer: C Diff: 1 Page Ref: Sec. 1.5-1.6 12) Express the number 0.02 days using a prefix of Table 1-4. A) 2 decidays B) 2 centidays C) 2 millidays D) 2 microdays Answer: B Diff: 1 Page Ref: Sec. 1.5-1.6 13) What is the conversion factor between km/h and m/s? A) 0.0278 m/s B) 0.278 m/s C) 3.60 m/s D) 16.7 m/s Answer: B Diff: 1 Page Ref: Sec. 1.5-1.6 3 Chapter 1: Introduction, Measurement, Estimating 14) What is the conversion factor between km/h 2 and m/s 2? A) 7.72 ˛ 10-6 m/s 2 B) 2.78 ˛ 10-1 m/s 2 C) 1.30 ˛ 104 m/s 2 D) 3.60 m/s 2 Answer: A Diff: 1 Page Ref: Sec. 1.5-1.6 15) What is the conversion factor between cm2 and m2? A) 0.01 m2/cm2 B) 0.0001 m2/cm2 C) 100 m2/cm2 D) 10000 m2/cm2 Answer: B Diff: 1 Page Ref: Sec. 1.5-1.6 16) The position, x, of an object is given by the equation x = A + Bt +Ct2, where t refers to time. What are the dimensions of A, B, and C? A) distance, distance, distance B) distance, time, time2 C) distance, distance/time, distance/time2 D) distance/time, distance/time2, distance/time3 Answer: C Diff: 2 Page Ref: Sec. 1.8 Quantitative Problems 1) What is the percent uncertainty in the measurement 2.58 ± 0.15 cm? A) 2.9% B) 5.8% C) 8.7% D) 12% Answer: B Diff: 2 Page Ref: Sec. 1.4 2) What, approximately, is the percent uncertainty for the measurement 5.2? A) 1% B) 2% C) 3% D) 4% Answer: B Diff: 2 Page Ref: Sec. 1.4 4 Physics: Principles with Applications, Sixth Edition 3) What is the percent uncertainty in the area of a circle whose radius is 1.8 ˛ 104 cm? A) 1.1% B) 5.6% C) 11% D) 56% Answer: C Diff: 3 Page Ref: Sec. 1.4 4) What is the volume, and its approximate uncertainty, of a sphere of radius 1.96 ± 0.01 m? A) 31.5 ± 0.2 m2 B) 31.5 ± 0.3 m2 C) 31.5 ± 0.4 m2 D) 31.5 ± 0.5 m2 Answer: D Diff: 3 Page Ref: Sec. 1.4 5) The number of significant figures in 10001 is A) two. B) three. C) five. D) six. Answer: C Diff: 1 Page Ref: Sec. 1.4 6) The number of significant figures in 0.01500 is A) two. B) three. C) four. D) five. Answer: C Diff: 1 Page Ref: Sec. 1.4 7) The number of significant figures in 0.040 is A) one. B) two. C) three. D) four. Answer: B Diff: 1 Page Ref: Sec. 1.4 5 Chapter 1: Introduction, Measurement, Estimating 8) Which of the following has three significant figures? A) 305.0 cm B) 0.0500 mm C) 1.00081 kg D) 8.060 ˛ 1011 m2 Answer: B Diff: 1 Page Ref: Sec. 1.4 9) What is the sum of 2.67 + 1.976 + 2.1? A) 6.7 B) 6.75 C) 6.746 D) 6.7460 Answer: A Diff: 1 Page Ref: Sec. 1.4 10) What is the difference between 103.5 and 102.24? A) 1.3 B) 1.26 C) 1.260 D) 1.2600 Answer: A Diff: 1 Page Ref: Sec. 1.4 11) What is the product of 12.56 and 2.12? A) 27 B) 26.6 C) 26.23 D) 26.627 Answer: B Diff: 1 Page Ref: Sec. 1.4 12) What is the result of 2.43 d 4.561? A) 5.3278 ˛ 10-1 B) 5.328 ˛ 10-1 C) 5.33 ˛ 10-1 D) 5.3 ˛ 10-1 Answer: C Diff: 1 Page Ref: Sec. 1.4 6 Physics: Principles with Applications, Sixth Edition 13) What is the cosine of 55e ? A) 0.6 B) 0.57 C) 0.574 D) 0.5736 Answer: B Diff: 1 Page Ref: Sec. 1.4 14) The length and width of a rectangle are 1.125 m and 0.606 m, respectively. Multiplying, your calculator gives the product as 0.68175. Rounding properly to the correct number of significant figures, the area should be written as A) 0.68 m2. B) 0.682 m2. C) 0.6818 m2. D) 0.68175 m2. Answer: B Diff: 1 Page Ref: Sec. 1.4 15) The length and width of a rectangle are 1.125 m and 0.606 m, respectively. You calculate the rectangle’s perimeter by adding these and multiplying by two. Your calculator’s display reads 3.462. To the correct number of significant figures, this should be written as A) 3.5 m. B) 3.46 m. C) 3.462 m. D) 3.4620 m. Answer: C Diff: 1 Page Ref: Sec. 1.4 16) A rectangle is 3.25 m long and 1.5 m wide. What is its area? A) 4.875 m2 B) 4.87 m2 C) 4.80 m2 D) 4.9 m2 Answer: D Diff: 2 Page Ref: Sec. 1.4 7 Chapter 1: Introduction, Measurement, Estimating 17) A rectangular garden measures 15 m long and 13.7 m wide. What is the length of a diagonal from one corner of the garden to the other? A) 18 m B) 19 m C) 20 m D) 4.1 ˛ 102 m Answer: C Diff: 2 Page Ref: Sec. 1.4 18) Select the smallest value. A) 15 ˛ 10-3 B) 0.15 ˛ 100 C) 0.00015 ˛ 103 D) 0.00000015 ˛ 106 Answer: A Diff: 1 Page Ref: Sec. 1.4 19) Write the number 0.00045 in power of ten notation. A) 4.5 ˛ 10-4 B) 4.5 ˛ 10-3 C) 4.5 ˛ 10-2 D) 4.5 ˛ 10-1 Answer: A Diff: 1 Page Ref: Sec. 1.4 20) 0.0001776 can also be expressed as A) 1.776 ˛ 10-4. B) 17.72 ˛ 104. C) 1772 ˛ 105. D) 177.2 ˛ 107. Answer: A Diff: 1 Page Ref: Sec. 1.4 21) 4567.89 is properly expressed in scientific notation as A) 4.56789 ˛ 103. B) 45.6789 ˛ 102. C) 456.789 ˛ 101. D) 4567.89 ˛ 100. Answer: A Diff: 1 Page Ref: Sec. 1.4 8 Physics: Principles with Applications, Sixth Edition 22) Convert 1.2 ˛ 10-3 to decimal notation. A) 1.200 B) 0.1200 C) 0.0120 D) 0.0012 Answer: D Diff: 1 Page Ref: Sec. 1.4 23) Write out the number 8.42 ˛ 10-5 in full with a decimal point and correct number of zeros. A) 0.00000842 B) 0.0000842 C) 0.000842 D) 0.00842 Answer: B Diff: 1 Page Ref: Sec. 1.4 24) What is the result of (0.410 + 0.021) ˛ (2.20 ˛ 103)? A) 880 B) 946 C) 948 D) 950 Answer: C Diff: 2 Page Ref: Sec. 1.4 25) Write the number 13.5 gigameters as full (decimal) numbers with standard units. A) 135,000 m B) 135,000,000 m C) 135,000,000,000 m D) 13,500,000,000 m Answer: D Diff: 1 Page Ref: Sec. 1.5-1.6 26) 100 mL is equivalent to which of the following? A) 1 kL B) 10-6 mL C) 0.1 L D) 0.01 ML Answer: C Diff: 1 Page Ref: Sec. 1.5-1.6 9 Chapter 1: Introduction, Measurement, Estimating 27) How many grams is forty milligrams? A) 0.000040 g B) 0.00040 g C) 0.040 g D) 40000 g Answer: C Diff: 1 Page Ref: Sec. 1.5-1.6 28) How many meters is sixty kilometers? A) 600,000 m B) 60,000 m C) 60 m D) 0.06 m Answer: B Diff: 1 Page Ref: Sec. 1.5-1.6 29) 1 angstrom = 10-10 m and 1 fermi = 10-15 m, what is the relationship between these units? A) 1 angstrom = 105 fermi B) 1 angstrom = 10-5 fermi C) 1 angstrom = 10-25 fermi D) 1 angstrom = 10+25 fermi Answer: A Diff: 1 Page Ref: Sec. 1.5-1.6 30) 0.00325 ˛ 10-8 cm can also be expressed in mm as A) 3.25 ˛ 10-12 mm. B) 3.25 ˛ 10-11 mm. C) 3.25 ˛ 10-10 mm. D) 3.25 ˛ 10-9 mm. Answer: C Diff: 2 Page Ref: Sec. 1.5-1.6 31) Which one of the following is not equivalent to 2.50 miles? (1 mi = 1.609 km = 5280 ft, 1 ft = 12 in.) A) 1.32 ˛ 104 ft B) 1.58 ˛ 105 in. C) 4.02 ˛ 103 km D) 4.40 ˛ 103 yd Answer: C Diff: 1 Page Ref: Sec. 1.5-1.6 10 Physics: Principles with Applications, Sixth Edition 32) If you are 5’10” tall, what is your height in meters? (1 in = 2.54 cm.) A) 1.5 m B) 1.6 m C) 1.7 m D) 1.8 m Answer: D Diff: 1 Page Ref: Sec. 1.5-1.6 33) If 1 inch = 2.54 cm, and 1 yd = 36 in., how many meters are in 7.00 yd? A) 6.40 m B) 36.3 m C) 640 m D) 1.78 ˛ 103 m Answer: A Diff: 2 Page Ref: Sec. 1.5-1.6 34) A hot air balloon rises to an altitude of 600 fathoms. What is this height, in feet? (1 fathom = 6 ft.) A) 100 ft B) 600 ft C) 1200 ft D) 3600 ft Answer: D Diff: 1 Page Ref: Sec. 1.5-1.6 35) The average life of an animal is 70 years. Assume one numerical figure, write this in power of ten in seconds. A) 3 ˛ 107 s B) 2 ˛ 107 s C) 2 ˛ 109 s D) 3 ˛ 109 s Answer: C Diff: 1 Page Ref: Sec. 1.5-1.6 36) The mass of an electron is 9.1 ˛ 10-31 kg. How many electrons will make a mass of 1.0 kg? A) 9.1 ˛ 1030 B) 1.1 ˛ 1030 C) 9.1 ˛ 1031 D) 1.1 ˛ 1031 Answer: B Diff: 1 Page Ref: Sec. 15-1.6 11 Chapter 1: Introduction, Measurement, Estimating 37) How many m/s is 50 mi/h equivalent to? (1 mi = 1609 m.) A) 49 m/s B) 2.2 m/s C) 22 m/s D) 45 m/s Answer: C Diff: 1 Page Ref: Sec. 1.5-1.6 38) How much longer (percentage) is a 100 m dash than a 100 yd dash? (1 yd = 0.9146 m.) A) 3.5% B) 6.5% C) 8.5% D) 12% Answer: C Diff: 1 Page Ref: Sec. 1.5-1.6 39) Which is the largest area? A) 2,500,000 cm2 B) 100,000 cm2 C) 7.5 m2 D) 0.75 m2 Answer: B Diff: 1 Page Ref: Sec. 1.5-1.6 40) If 1 inch = 2.54 cm, how many square centimeters are in 1.00 square in.? A) 1.59 B) 2.54 C) 5.08 D) 6.45 Answer: D Diff: 2 Page Ref: Sec. 1.5-1.6 41) Express the following sum with the correct number of significant figures: 1.00 kg + 1531 g + 2.54 ˛ 104 mg. A) 2.56 kg B) 27.9 kg C) 2.53 kg D) 2.79 kg Answer: A Diff: 2 Page Ref: Sec. 1.5-1.6 12 Physics: Principles with Applications, Sixth Edition 42) A football field is 120 yd long and 50 yd wide. What is the area of the football field, in m2, if 1 yd = 91.44 cm? A) 2.4 ˛ 103 m2 B) 3.7 ˛ 103 m2 C) 4.2 ˛ 103 m2 D) 5.0 ˛ 103 m2 Answer: D Diff: 2 Page Ref: Sec. 1.5-1.6 43) A ball has a radius of 3.23 cm. What is the volume of the ball in m3? A) 1.41 ˛ 10-4 B) 1.41 C) 4.23 ˛ 10-4 D) 4.23 Answer: A Diff: 2 Page Ref: Sec. 1.5-1.6 44) A thick-walled metal pipe of length 20.0 cm has an inside diameter of 2.00 cm and an outside diameter of 2.40 cm. What is the total surface area of the pipe, counting the ends, in m2? A) 276 B) 277 C) 278 D) 279 Answer: D Diff: 3 Page Ref: Sec. 1.5-1.6 45) The radius of the Earth is 3963 mi. What is the surface area of the Earth in square meters? (1 mi = 1609 m.) A) 4.9 ˛ 107 m2 B) 1.3 ˛ 1014 m2 C) 2.6 ˛ 1014 m2 D) 5.1 ˛ 1014 m2 Answer: D Diff: 2 Page Ref: Sec. 1.5-1.6 13 Chapter 1: Introduction, Measurement, Estimating 46) The average density of blood is 1.06 ˛ 103 kg/m3. If you donate a pint of blood to the Red Cross, what mass of blood have you donated, in grams? (1 pt = 1/2 L, 1 L = 1000 cm3.) A) 530 g B) 0.530 g C) 5300 g D) 5.30 ˛ 105 g Answer: A Diff: 2 Page Ref: Sec. 1.5-1.6 47) The mass of Mars, 6.40 ˛ 1023 kg, is about one-tenth that of the Earth, and its radius, 3395 km, is about half that of Earth. What is the mean density of Mars in kg/m3? A) 9.76 ˛ 102 B) 1.95 ˛ 103 C) 3.90 ˛ 103 D) 7.81 ˛ 103 Answer: C Diff: 2 Page Ref: Sec. 1.5-1.6 48) Concrete is sold by the cubic yard. What is the mass, in kilograms, of one cubic yard of concrete that is five times as dense as water? (1 m = 1.094 yd, and 1 m3 of water has a mass of 1,000 kg.) A) 764 kg B) 2.42 ˛ 103 kg C) 3.82 ˛ 103 kg D) 6.55 ˛ 103 kg Answer: C Diff: 2 Page Ref: Sec. 1.5-1.6 49) An average human has a heart rate of 70 beats per minute. If someone’s heart beats at that average rate over a 70-yr lifetime, how many times would it beat? A) 7˛ 105 B) 2 ˛ 106 C) 2 ˛ 107 D) 3 ˛ 109 Answer: D Diff: 2 Page Ref: Sec. 1.7 14 Physics: Principles with Applications, Sixth Edition 50) A large school district has 300 school buses. If each school bus is used 3 hours each day, the average speed of the school buses is 15 mi/h, and the fuel economy of the buses is 10 mi/gal. How much does it cost to run these buses in 22 school days if gasoline costs $1.20 a gallon? A) $600 B) $1200 C) $1800 D) $2400 Answer: B Diff: 2 Page Ref: Sec. 1.7 51) A person stands 35.0 m from a flag pole. With a protractor at eye level, he finds that the angle at the top of the flag pole makes with the horizontal is 25.0 degrees. How high is the flag pole? (The distance from his feet to his eyes is 1.7 m.) A) 10 m B) 20 m C) 30 m D) 80 m Answer: B Diff: 2 Page Ref: Sec. 1.7 52) Starting from city A, a car drives 250 miles east to city B, then 300 miles north to city C, and finally 700 miles west to city D. What is the distance between city A and city D? A) 300 mi B) 400 mi C) 500 mi D) 600 mi Answer: C Diff: 2 Page Ref: Sec. 1.7 53) The last page of a book is numbered 764. The book is 3.00 cm thick. What is the average thickness of a sheet of paper in the book, in centimeters? A) 4 ˛ 10-3 B) 8 ˛ 10-3 C) 100 D) 200 Answer: B Diff: 2 Page Ref: Sec. 1.7 15 Chapter 1: Introduction, Measurement, Estimating 54) Wall posters are usually sold curled up in cylindrical cardboard tubes. If the length of the tube is 84.5 cm, and the diameter of the tube is 2.40 cm, what is the area of the poster, in cm2? (Assume the poster doesn’t overlap itself.) A) 200 cm2 B) 400 cm2 C) 600 cm2 D) 2000 cm2 Answer: C Diff: 2 Page Ref: Sec. 1.7 16 Chapter 2 Describing Motion: Kinematics in One Dimension Conceptual Questions 1) Suppose that an object travels from one point in space to another. Make a comparison between the displacement and the distance traveled. A) The displacement is either greater than or equal to the distance traveled. B) The displacement is always equal to the distance traveled. C) The displacement is either less than or equal to the distance traveled. D) The displacement can be either greater than, smaller than, or equal to the distance traveled. Answer: C Diff: 2 Page Ref: Sec. 2.1 2) When is the average velocity of an object equal to the instantaneous velocity? A) always B) never C) only when the velocity is constant D) only when the velocity is increasing at a constant rate Answer: C Diff: 2 Page Ref: Sec. 2.2-2.3 3) A new car manufacturer advertises that their car can go “from zero to sixty in 8 s”. This is a description of A) average speed. B) instantaneous speed. C) average acceleration. D) instantaneous acceleration. Answer: C Diff: 1 Page Ref: Sec. 2.4 17 Chapter 2: Describing Motion: Kinematics in One Dimension 4) An object moving in the +x axis experiences an acceleration of 2.0 m/s2. This means the object is A) traveling at 2.0 m in every second. B) traveling at 2.0 m/s in every second. C) changing its velocity by 2.0 m/s. D) increasing its velocity by 2.0 m/s in every second. Answer: D Diff: 1 Page Ref: Sec. 2.4 5) Suppose that a car traveling to the East (+x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleration. A) The car is decelerating, and its acceleration is positive. B) The car is decelerating, and its acceleration is negative. C) The acceleration is zero. D) A statement cannot be made using the information given. Answer: B Diff: 1 Page Ref: Sec. 2.4 6) Suppose that a car traveling to the West (-x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleration. A) The car is decelerating, and its acceleration is positive. B) The car is decelerating, and its acceleration is negative. C) The acceleration is zero. D) A statement cannot be made using the information given. Answer: A Diff: 2 Page Ref: Sec. 2.4 7) Suppose that an object is moving with a constant velocity. Make a statement concerning its acceleration. A) The acceleration must be constantly increasing. B) The acceleration must be constantly decreasing. C) The acceleration must be a constant non-zero value. D) The acceleration must be equal to zero. Answer: D Diff: 1 Page Ref: Sec. 2.4 18 Physics: Principles with Applications, Sixth Edition 8) If the velocity of an object is zero, does it mean that the acceleration is zero? Support your answer with an example. A) no, and an example would be an object starting from rest B) no, and an example would be an object coming to a stop C) yes, because of the way in which velocity is defined D) yes, because of the way in which acceleration is defined Answer: A Diff: 1 Page Ref: Sec. 2.4 9) Can an object’s velocity change direction when its acceleration is constant? Support your answer with an example. A) No, this is not possible because it is always speeding up. B) No, this is not possible because it is always speeding up or always slowing down, but it can never turn around. C) Yes, this is possible, and a rock thrown straight up is an example. D) Yes, this is possible, and a car that starts from rest, speeds up, slows to a stop, and then backs up is an example. Answer: C Diff: 2 Page Ref: Sec. 2.4 10) Suppose that an object is moving with constant acceleration. Make a statement concerning its motion with respect to time. A) In equal times its speed increases by equal amounts. B) In equal times its velocity changes by equal amounts. C) In equal times it moves equal distances. D) A statement cannot be made using the information given. Answer: B Diff: 2 Page Ref: Sec. 2.4 11) Can an object have increasing speed while its acceleration is decreasing? Support your answer with an example. A) No, this is impossible because of the way in which acceleration is defined. B) No, because if acceleration is decreasing the object will be slowing down. C) Yes, and an example would be an object falling in the absence of air friction. D) Yes, and an example would be an object released from rest in the presence of air friction. Answer: D Diff: 2 Page Ref: Sec. 2.4 19 Chapter 2: Describing Motion: Kinematics in One Dimension 12) Suppose a can, after an initial kick, moves up along a smooth hill of ice. Make a statement concerning its acceleration. A) It will travel at constant velocity with zero acceleration. B) It will have a constant acceleration up the hill, but a different constant acceleration when it comes back down the hill. C) It will have the same acceleration, both up the hill and down the hill. D) It will have a varying acceleration along the hill. Answer: C Diff: 3 Page Ref: Sec. 2.4 13) Under what condition is average velocity equal to the average of the object’s initial and final velocity? A) The acceleration must be constantly changing. B) The acceleration must be constant. C) This can only occur if there is no acceleration. D) This is impossible. Answer: B Diff: 2 Page Ref: Sec. 2.4 14) Objects A and B both start at rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the final speed of object A compared to that of object B? A) the same speed B) twice as fast C) three times as fast D) four times as fast Answer: B Diff: 2 Page Ref: Sec. 2.5-2.6 15) Objects A and B both start from rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the distance traveled by object A compared to that of object B? A) the same distance B) twice as far C) three times as far D) four times as far Answer: D Diff: 2 Page Ref: Sec. 2.5-2.6 20 Physics: Principles with Applications, Sixth Edition 16) When an object is released from rest and falls in the absence of friction, which of the following is true concerning its motion? A) The speed of the falling object is proportional to its mass. B) The speed of the falling object is proportional to its weight. C) The speed of the falling object is inversely proportional to its surface area. D) None of the above is true. Answer: D Diff: 1 Page Ref: Sec. 2.7 17) When an object is released from rest and falls in the absence of friction, which of the following is true concerning its motion? A) Its acceleration is constant. B) Its velocity is constant. C) Neither its acceleration nor its velocity is constant. D) Both its acceleration and its velocity are constant. Answer: A Diff: 1 Page Ref: Sec. 2.7 18) Suppose a ball is thrown straight up. Make a statement about the velocity and the acceleration when the ball reaches the highest point. A) Both its velocity and its acceleration are zero. B) Its velocity is zero and its acceleration is not zero. C) Its velocity is not zero and its acceleration is zero. D) Neither its velocity nor its acceleration is zero. Answer: B Diff: 1 Page Ref: Sec. 2.7 19) Suppose a ball is thrown straight up. What is its acceleration just before it reaches its highest point? A) zero B) slightly less than g C) exactly g D) slightly greater than g Answer: C Diff: 1 Page Ref: Sec. 2.7 21 Chapter 2: Describing Motion: Kinematics in One Dimension 20) Suppose a ball is thrown straight up, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is going up. A) Both its velocity and its acceleration point upward. B) Its velocity points upward and its acceleration points downward. C) Its velocity points downward and its acceleration points upward. D) Both its velocity and its acceleration points downward. Answer: B Diff: 1 Page Ref: Sec. 2.7 21) A ball is thrown straight up, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is coming down. A) Both its velocity and its acceleration point upward. B) Its velocity points upward and its acceleration points downward. C) Its velocity points downward and its acceleration points upward. D) Both its velocity and its acceleration point downward. Answer: D Diff: 1 Page Ref: Sec. 2.7 22) Suppose a ball is thrown downward in the absence of air resistance. Make a statement concerning its acceleration. A) Its acceleration is constantly increasing. B) Its acceleration is constant. C) Its acceleration is constantly decreasing. D) Its acceleration is zero. Answer: B Diff: 1 Page Ref: Sec. 2.7 23) Suppose a skydiver jumps from a high-flying plane. What is her acceleration when she she reaches terminal velocity? A) It is essentially zero. B) It is in the upward direction. C) It is approximately 9.8 m/s2 downward. D) It is a constant pointing upward. Answer: A Diff: 2 Page Ref: Sec. 2.7 22 Physics: Principles with Applications, Sixth Edition 24) A ball is thrown vertically upward with a speed v. An identical second ball is thrown upward with a speed 2v (twice as fast). What is the ratio of the maximum height of the second ball to that of the first ball? (How many times higher does the second ball go than the first ball?) A) 4:1 B) 2:1 C) 1.7:1 D) 1.4:1 Answer: A Diff: 2 Page Ref: Sec. 2.7 25) Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. As time progresses, the distance between them A) increases. B) remains constant. C) decreases. D) cannot be determined from the information given. Answer: A Diff: 3 Page Ref: Sec. 2.7 26) Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. As time progresses, the difference in their speeds A) increases. B) remains constant. C) decreases. D) cannot be determined from the information given. Answer: B Diff: 3 Page Ref: Sec. 2.7 27) Two objects are thrown from the top of a tall building. One is thrown up, and the other is thrown down, both with the same initial speed. What are their speeds when they hit the street? A) The one thrown up is traveling faster. B) The one thrown down is traveling faster. C) They are traveling at the same speed. D) It is impossible to tell because the height of the building is not given. Answer: C Diff: 2 Page Ref: Sec. 2.7 23 Chapter 2: Describing Motion: Kinematics in One Dimension 28) A brick is dropped from the top of a building. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks. A) The first brick accelerates faster. B) The second brick accelerates faster. C) The two bricks accelerate at the same rate. D) It is impossible to determine from the information given. Answer: C Diff: 2 Page Ref: Sec. 2.7 29) An object is moving with constant non-zero velocity in the +x axis. The position versus time graph of this object is A) a horizontal straight line. B) a vertical straight line. C) a straight line making an angle with the time axis. D) a parabolic curve. Answer: C Diff: 1 Page Ref: Sec. 2.8 30) An object is moving with constant non-zero acceleration in the +x axis. The position versus time graph of this object is A) a horizontal straight line. B) a vertical straight line. C) a straight line making an angle with the time axis. D) a parabolic curve. Answer: D Diff: 1 Page Ref: Sec. 2.8 31) An object is moving with constant non-zero velocity in the +x axis. The velocity versus time graph of this object is A) a horizontal straight line. B) a vertical straight line. C) a straight line making an angle with the time axis. D) a parabolic curve. Answer: A Diff: 1 Page Ref: Sec. 2.8 24 Physics: Principles with Applications, Sixth Edition 32) An object is moving with constant non-zero acceleration in the +x axis. The velocity versus time graph of this object is A) a horizontal straight line. B) a vertical straight line. C) a straight line making an angle with the time axis. D) a parabolic curve. Answer: C Diff: 1 Page Ref: Sec. 2.8 33) The slope of a position versus time graph gives A) position. B) velocity. C) acceleration. D) displacement. Answer: B Diff: 1 Page Ref: Sec. 2.8 34) The slope of a velocity versus time graph gives A) position. B) velocity. C) acceleration. D) displacement. Answer: C Diff: 1 Page Ref: Sec. 2.8 35) The area under a curve in an acceleration versus time graph gives A) acceleration. B) velocity. C) displacement. D) position. Answer: B Diff: 2 Page Ref: Sec. 2.8 36) The area under a curve in a velocity versus time graph gives A) acceleration. B) velocity. C) displacement. D) position. Answer: C Diff: 2 Page Ref: Sec. 2.8 25 Chapter 2: Describing Motion: Kinematics in One Dimension 37) If the position versus time graph of an object is a horizontal line, the object is A) moving with constant non-zero speed. B) moving with constant non-zero acceleration. C) at rest. D) moving with infinite speed. Answer: C Diff: 1 Page Ref: Sec. 2.8 38) If the position versus time graph of an object is a vertical line, the object is A) moving with constant non-zero speed. B) moving with constant non-zero acceleration. C) at rest. D) moving with infinite speed. Answer: D Diff: 1 Page Ref: Sec. 2.8 39) If the velocity versus time graph of an object is a horizontal line, the object is A) moving with constant non-zero speed. B) moving with constant non-zero acceleration. C) at rest. D) moving with infinite speed. Answer: A Diff: 1 Page Ref: Sec. 2.8 40) If the velocity versus time graph of an object is a straight line making an angle of 30 degrees with the time axis, the object is A) moving with constant non-zero speed. B) moving with constant non-zero acceleration. C) at rest. D) moving with infinite speed. Answer: B Diff: 1 Page Ref: Sec. 2.8 26 Physics: Principles with Applications, Sixth Edition Quantitative Problems 1) An object moves 15.0 m north and then 11.0 m south. Find both the distance traveled and the magnitude of the displacement vector. A) 6.0 m, 26.0 m B) 26.0 m, 6.0 m C) 26.0 m, 26.0 m D) 6.0 m, 6.0 m Answer: B Diff: 1 Page Ref: Sec 2.1 2) A boat can move at 30 km/h in still water. How long will it take to move 12 km upstream in a river flowing 6.0 km/h? A) 20 min B) 22 min C) 24 min D) 30 min Answer: D Diff: 2 Page Ref: Sec. 2.1-2.3 3) 55 mi/h is how many m/s? (1 mi = 1609 m.) A) 25 m/s B) 49 m/s C) 90 m/s D) 120 m/s Answer: A Diff: 1 Page Ref: Sec. 2.2-2.3 4) What must be your average speed in order to travel 350 km in 5.15 h? A) 66.0 km/h B) 67.0 km/h C) 68.0 km/h D) 69.0 km/h Answer: C Diff: 1 Page Ref: Sec. 2.2-2.3 27 Chapter 2: Describing Motion: Kinematics in One Dimension 5) A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min. What is the average speed of the runner in m/s? A) 14.2 ˛ 103 m/s B) 124 m/s C) 3.95 m/s D) 14.2 m/s Answer: C Diff: 2 Page Ref: Sec. 2.2-2.3 6) A car travels 90 km/h. How long does it take for it to travel 400 km? A) 4.1 h B) 4.2 h C) 4.3 h D) 4.4 h Answer: D Diff: 1 Page Ref: Sec. 2.2-2.3 7) A ly (light year) is the distance that light travels in one year. The speed of light is 3.00 ˛ 108 m/s. How many miles are there in a ly? (1 mi = 1609 m, 1 yr = 365 d.) A) 9.46 ˛ 1012 mi B) 9.46 ˛ 1015 mi C) 5.88 ˛ 1012 mi D) 5.88 ˛ 1015 mi Answer: C Diff: 2 Page Ref: Sec. 2.2-2.3 8) If you are driving 72 km/h along a straight road and you look to the side for 4.0 s, how far do you travel during this inattentive period? A) 18 m B) 20 m C) 40 m D) 80 m Answer: D Diff: 1 Page Ref: Sec. 2.2-2.3 9) If you run a complete loop around an outdoor track (400 m), in 100 s, your average velocity is A) 0.25 m/s. B) 4.0 m/s. C) 40,000 m/s. D) zero. Answer: D Diff: 2 Page Ref: Sec. 2.2-2.3 28 Physics: Principles with Applications, Sixth Edition 10) A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. What was the bear’s average speed? A) 0 km/h B) 0.09 km/h C) 4.5 km/h D) 5.3 km/h Answer: D Diff: 1 Page Ref: Sec. 2.2-2.3 11) A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. What was the bear’s average velocity? A) 0 km/h B) 0.09 km/h C) 4.5 km/h D) 5.3 km/h Answer: A Diff: 2 Page Ref: Sec. 2.2-2.3 12) You are driving home on a weekend from school at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is your hometown from school? A) 180 mi B) 190 mi C) 200 mi D) 210 mi Answer: B Diff: 2 Page Ref: Sec. 2.2-2.3 13) A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this trip? A) 84 km/h B) 89 km/h C) 90 km/h D) 91 km/h Answer: B Diff: 2 Page Ref: Sec. 2.2-2.3 29 Chapter 2: Describing Motion: Kinematics in One Dimension 14) A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the trip? A) 85 km/h B) 88 km/h C) 90 km/h D) 92 km/h Answer: B Diff: 2 Page Ref: Sec. 2.2-2.3 15) An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north for 750 miles. What is the average speed for the trip? A) 260 mi/h B) 270 mi/h C) 275 mi/h D) 280 mi/h Answer: B Diff: 2 Page Ref: Sec. 2.2-2.3 16) In a 400-m relay race the anchorman (the person who runs the last 100 m) for team A can run 100 m in 9.8 s. His rival, the anchorman for team B, can cover 100 m in 10.1 s. What is the largest lead the team B runner can have when the team A runner starts the final leg of the race, in order that the team A runner not lose the race? A) 2.0 m B) 3.0 m C) 4.0 m D) 5.0 m Answer: B Diff: 3 Page Ref: Sec. 2.2-2.3 17) A car decelerates uniformly and comes to a stop after 10 s. The car’s average velocity during deceleration was 50 km/h. What was the car’s deceleration while slowing down? A) 10 km/h-s B) 8.0 km/h-s C) 5.0 km/h-s D) 4.0 km/h-s Answer: A Diff: 1 Page Ref: Sec. 2.4 30 Physics: Principles with Applications, Sixth Edition 18) An airplane increases its speed from 100 m/s to 160 m/s, at the average rate of 15 m/s2. How much time does it take for the complete increase in speed? A) 17 s B) 0.058 s C) 4.0 s D) 0.25 s Answer: C Diff: 1 Page Ref: Sec. 2.4 19) A car traveling 60 km/h accelerates at the rate of 2.0 m/s2. How much time is required for the car to reach a speed of 90 km/h? A) 15 s B) 30 s C) 45 s D) 4.2 s Answer: D Diff: 1 Page Ref: Sec. 2.4 20) A cart starts from rest and accelerates at 4.0 m/s2 for 5.0 s, then maintain that velocity for 10 s, and then decelerates at the rate of 2.0 m/s2 for 4.0 s. What is the final speed of the car? A) 20 m/s B) 16 m/s C) 12 m/s D) 10 m/s Answer: C Diff: 2 Page Ref: Sec. 2.4 21) A car travels at 15 m/s for 10 s. It then speeds up with a constant acceleration of 2.0 m/s2 for 15 s. At the end of this time, what is its velocity? A) 15 m/s B) 30 m/s C) 45 m/s D) 375 m/s Answer: C Diff: 2 Page Ref: Sec. 2.4 31 Chapter 2: Describing Motion: Kinematics in One Dimension 22) A cart with an initial velocity of 5.0 m/s experiences a constant acceleration of 2.0 m/s2. What is the cart’s displacement during the first 6.0 s of its motion? A) 10 m B) 55 m C) 66 m D) 80 m Answer: C Diff: 1 Page Ref: Sec 2.5-2.6 23) A bullet moving horizontally to the right (+x direction) with a speed of 500 m/s strikes a sandbag and penetrates a distance of 10.0 cm. What is the average acceleration, in m/s 2, of the bullet? A) -1.25 ˛ 106 B) -2.50 ˛ 106 C) -1.25 ˛ 103 D) -2.50 ˛ 103 Answer: A Diff: 2 Page Ref: Sec. 2.5-2.6 24) A jet fighter plane is launched from a catapult on an aircraft carrier. It reaches a speed of 42 m/s at the end of the catapult, and this requires 2.0 s. Assuming the acceleration is constant, what is the length of the catapult? A) 16 m B) 24 m C) 42 m D) 84 m Answer: C Diff: 2 Page Ref: Sec. 2.5-2.6 25) A car starting from rest moves with constant acceleration of 2.0 m/s2 for 10 s, then travels with constant speed for another 10 s, and then finally slows to a stop with constant acceleration of -2.0 m/s2. How far does it travel? A) 200 m B) 300 m C) 400 m D) 500 m Answer: C Diff: 2 Page Ref: Sec. 2.5-2.6 32 Physics: Principles with Applications, Sixth Edition 26) A car goes from 40 m/s to 80 m/s in a distance of 200 m. What is its average acceleration? A) 8.0 m/s2 B) 9.6 m/s2 C) 12 m/s2 D) 24 m/s2 Answer: C Diff: 2 Page Ref: Sec. 2.5-2.6 27) An object starts from rest and undergoes uniform acceleration. During the first second it travels 5.0 m. How far will it travel during the third second? A) 5.0 m B) 15 m C) 25 m D) 45 m Answer: C Diff: 2 Page Ref: Sec. 2.5-2.6 28) An object is moving in a straight line with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this time? A) 30 m B) 39 m C) 48 m D) 57 m Answer: B Diff: 2 Page Ref: Sec. 2.5-2.6 29) A car starts from rest and accelerates uniformly at 3.0 m/s2. A second car starts from rest 6.0 s later at the same point and accelerates uniformly at 5.0 m/s2. How long does it take the second car to overtake the first car? A) 12 s B) 19 s C) 21 s D) 24 s Answer: C Diff: 3 Page Ref: Sec. 2.5-2.6 30) A car with good tires on a dry road can decelerate at about 5.0 m/s2 when braking. Suppose a car is initially traveling at 55 mi/h. (a.) How much time does it take the car to stop? (b.) What is the stopping distance? Answer: (a.) 4.9 s (b.) 60 m Diff: 1 Page Ref: Sec. 2.5-2.6 33 Chapter 2: Describing Motion: Kinematics in One Dimension 31) At the instant a traffic light turns green, a car that has been waiting at the intersection starts ahead with a constant acceleration of 2.00 m/s2. At that moment a truck traveling with a constant velocity of 15.0 m/s overtakes and passes the car. (a.) Calculate the time necessary for the car to reach the truck. (b.) Calculate the distance beyond the traffic light that the car will pass the truck. (c.) Determine the speed of the car when it passes the truck. Answer: (a.) 15.0 s (b.) 225 m (c.) 30.0 m/s Diff: 3 Page Ref: Sec. 2.5-2.6 32) An object is thrown upward with a speed of 12 m/s on the surface of planet X where the acceleration due to gravity is 1.5 m/s2. What is the maximum height reached by the object? A) 8.0 m B) 18 m C) 48 m D) 144 m Answer: C Diff: 1 Page Ref: Sec. 2.7 33) An object is thrown upward with a speed of 12 m/s on the surface of planet X where the acceleration due to gravity is 1.5 m/s2. How long does it take for the object to reach the maximum height? A) 8.0 s B) 11 s C) 14 s D) 16 s Answer: A Diff: 1 Page Ref: Sec. 2.7 34) An object is thrown upward with a speed of 15 m/s on the surface of planet X where the acceleration due to gravity is 2.5 m/s2. How long does it take for the object to return to where it is thrown? A) 6.0 s B) 8.0 s C) 10 s D) 12 s Answer: D Diff: 1 Page Ref: Sec. 2.7 34 Physics: Principles with Applications, Sixth Edition 35) An object is thrown upward with a speed of 14 m/s on the surface of planet X where the acceleration due to gravity is 3.5 m/s2. What is the speed of the object after 8.0 s? A) 7.0 m/s B) 14 m/s C) 21 m/s D) 64 m/s Answer: B Diff: 1 Page Ref: Sec. 2.7 36) Human reaction time is usually greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall before you catch it? A) at least 3.0 cm B) at least 4.9 cm C) at least 6.8 cm D) at least 9.8 cm Answer: B Diff: 1 Page Ref: Sec. 2.7 37) A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity after 3.00 s? A) 9.8 m/s upward B) 9.8 m/s downward C) zero D) 19.6 downward Answer: B Diff: 1 Page Ref: Sec. 2.7 38) A bullet shot straight up returns to its starting point in 10 s. What is the initial speed of the bullet? A) 9.8 m/s B) 25 m/s C) 49 m/s D) 98 m/s Answer: C Diff: 1 Page Ref: Sec. 2.7 35 Chapter 2: Describing Motion: Kinematics in One Dimension 39) A ball is thrown straight up with a speed of 36.0 m/s. How long does it take to return to its starting point? A) 3.67 s B) 7.35 s C) 11.0 s D) 14.7 s Answer: B Diff: 1 Page Ref: Sec. 2.7 40) A ball is thrown downward from the top of a building with an initial speed of 25 m/s. It strikes the ground after 2.0 s. How high is the building? A) 20 m B) 30 m C) 50 m D) 70 m Answer: D Diff: 2 Page Ref: Sec. 2.7 41) A ball is thrown straight up with a speed of 30 m/s. (a.) How long does it take the ball to reach the maximum height? (b.) What is the maximum height reached by the ball? (c.) What is its speed after 4.2 s? Answer: (a.) 3.1 s (b.) 46 m (c.) 11 m/s Diff: 1 Page Ref: Sec. 2.7 42) A foul ball is hit straight up into the air with a speed of 30.0 m/s. (a.) Calculate the time required for the ball to rise to its maximum height. (b.) Calculate the maximum height reached by the ball. (c.) Determine the time at which the ball pass a point 25.0 m above the point of contact between the bat and ball. (d.) Explain why there are two answers to part c. Answer: (a.) 3.06 s (b.) 45.9 m (c.) 0.995 s and 5.13 s (d.) One value for the ball traveling upward; one value for the ball traveling downward. Diff: 2 Page Ref: Sec. 2.7 36 Physics: Principles with Applications, Sixth Edition FIGURE 2-1 43) In Fig. 2-1, what is the velocity at t = 1.0 s? A) 0 B) 10 m/s C) 20 m/s D) -40 m/s Answer: B Diff: 1 Page Ref: Sec. 2.8 44) In Fig. 2-1, what is the velocity at t = 2.5 s? A) 0 B) 10 m/s C) 20 m/s D) -40 m/s Answer: C Diff: 1 Page Ref: Sec. 2.8 45) In Fig. 2-1, what is the velocity at t = 4.0 s? A) 0 B) 10 m/s C) 20 m/s D) -40 m/s Answer: A Diff: 1 Page Ref: Sec. 2.8 37 Chapter 2: Describing Motion: Kinematics in One Dimension 46) In Fig. 2-1, what is the velocity at t = 5.5 s? A) 0 B) 10 m/s C) 20 m/s D) -40 m/s Answer: D Diff: 1 Page Ref: Sec. 2.8 47) In Fig. 2-1, what is the average velocity from 0 to 4.0 s? A) 0 B) 10 m/s C) 20 m/s D) -40 m/s Answer: B Diff: 1 Page Ref: Sec. 2.8 48) In Fig. 2-1, what is the average velocity from 0 to 6.0 s? A) 0 B) 10 m/s C) 20 m/s D) -40 m/s Answer: A Diff: 1 Page Ref: Sec. 2.8 38 Physics: Principles with Applications, Sixth Edition FIGURE 2-2 49) In Fig. 2-2, what is the acceleration at 1.0 s? A) 0 B) 2.0 m/s2 C) -2.5 m/s2 D) 10 m/s2 Answer: D Diff: 1 Page Ref: Sec. 2.8 50) In Fig. 2-2, what is the acceleration at 3.0 s? A) 0 B) 2.0 m/s2 C) -2.5 m/s2 D) 10 m/s2 Answer: A Diff: 1 Page Ref: Sec. 2.8 51) In Fig. 2-2, what is the average acceleration from 0 to 5.0 s? A) 0 B) 2.0 m/s2 C) -2.5 m/s2 D) 10 m/s2 Answer: B Diff: 1 Page Ref: Sec. 2.8 39 Chapter 2: Describing Motion: Kinematics in One Dimension 52) In Fig. 2-2, what is the average acceleration from 0 to 8.0 s? A) 0 B) 2.0 m/s2 C) -2.5 m/s2 D) 10 m/s2 Answer: C Diff: 1 Page Ref: Sec. 2.8 53) In Fig. 2-2, what is the displacement from 0 to 8.0 s? A) 20 m B) 40 m C) 60 m D) 80 m Answer: C Diff: 1 Page Ref: Sec. 2.8 40 Chapter 3 Kinematics in Two Dimensions; Vectors Conceptual Questions 1) Which one of the following is an example of a vector quantity? A) distance B) velocity C) mass D) area Answer: B Diff: 1 Page Ref: Sec. 3.1 2) Which of the following operations will not change a vector? A) Translate it parallel to itself. B) Rotate it. C) Multiply it by a constant factor. D) Add a constant vector to it. Answer: A Diff: 1 Page Ref: Sec. 3.2-3.4 3) Which of the following is an accurate statement? A) A vector cannot have zero magnitude if one of its components is not zero. B) The magnitude of a vector can be less than the magnitude of one of its components. C) If the magnitude of vector A is less than the magnitude of vector B, then the x-component of A is less than the x-component of B. D) The magnitude of a vector can be positive or negative. Answer: A Diff: 1 Page Ref: Sec. 3.2-3.4 4) The resultant of two vectors is the smallest when the angle between them is A) 0e. B) 45e . C) 90e. D) 180e . Answer: D Diff: 1 Page Ref: Sec. 3.2-3.4 41