College Physics Alan Giambattista Betty Richardson Robert Richardson 4th edition Chapter 3 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Question 1 Does the displacement of an object depend on the specific location of the origin of the coordinate system? A)Yes B)No

Question 2 Ben leaves his home and walks to the bank, then to the park. What is the distance that Ben has walked? A)2 blocks B)3 blocks C)5 blocks D)7 blocks

Question 3 Ben leaves his home and walks to the bank, then to the park. What is his final displacement? A) 2 blocks east B) 3 blocks east C) 5 blocks east D) 7 blocks east

Question 4 Which of the following is a complete description of the position of the public library? A)3 blocks west B) west of the town square C) 3 blocks west of the town square D)3 blocks away from the town square E) all of the above

Question 5 The graph of position vs. time is given for a train. What can you say about the train's motion from time t 1 to time t 2 ? A)It is moving with constant velocity. B)It is not moving. C)It is moving with a constant negative velocity. D)It is accelerating.

Question 6 The graph for position vs. time is given at right for a car. What can you say about the velocity of the car over time? A)It speeds up all the time B)It slows down all the time C)It moves at constant velocity D)Sometimes it speeds up and sometimes it slows E)not really sure

Question 7 Which represents v vs. t for a dropped ball bouncing back up? A)B) C)D)

Question 8 In which of these v vs. t graphs is the acceleration changing? A)a B)b C)c D)d

Question 9 If the average velocity is non-zero over a time interval, does this mean that the instantaneous velocity is never zero over that same time interval? A)Yes B)No

Question 10 If the velocity of an object is non-zero, can the acceleration of the object be zero? A)Yes B)No

Question 11 When throwing a ball straight up, which of the following correctly describes the acceleration vector at the highest point in its path? A)The acceleration vector points down. B) The acceleration vector points up. C)There is no acceleration.

Question 12 In which of the following cases is the acceleration zero? A)A car increases its speed from 0 mph to 30 mph. B)A car decreases its speed from 15 mph to 5 mph. C)A car goes around a curve at a speed of 30 mph. D)A car backs out of a drive at 10 mph.

Question 13 You are bicycling to the grocery store. As you reach your destination and prepare to stop, which of the following statements is true? A) Your velocity is forward and the acceleration is backward. B) Your velocity and acceleration are both forward. C) Your velocity and acceleration are both backward. D) Your velocity is backward and your acceleration is forward.

A constant force is acting on an object. Which of these graphs best represents the velocity of the object? A)B)C) Question 14

Question 15 Two blocks of mass m 1 and m 2 are connected by strings and pulled with constant acceleration a. What is the relationship between the tension in each of the strings? A)T 1 > T 2 B)T 1 < T 2 C)T 1 = T 2 D)T 1 = T 2 = 0

Question 16 A force F acts on block 1 with mass m and block 2 with mass 2m. Which graph correctly represents the accelerations of the blocks? A)B)C)

Question 17 A single force is acting on an object. Which type of motion is not physically allowed? A)the object speeds up B)the object is at rest C)the object slows down D)the object's motion changes direction

Question 18 A wrench has a mass of 0.75 kg here on earth. It is shipped up to be used on the International Space Station. An astronaut on the Space Station will measure its mass to be A)0 kg. B)7.5 N. C)1.7 lbs. D)0.75 kg.

Question 19 As a train travels with a speed v TG = 15.5 m/s, Wanda walks toward the front of the train with a speed v WT = 1.2 m/s. What is her speed relative to the ground? A)0 m/s B)16.7 m/s C)14.3 m/s D)impossible to tell

Question 20 You are watching a parade when a float goes by with speed v f where a child is throwing darts at a target at the back of the float with speed v d. You measure the speed of the darts to be A)v d B)v f C)v d + v f D)v d - v f

Answer Key – Chapter 3 1. B 2. D 3. B 4. C 5. B 6. B 7. C 8. C 9. B 10. A 11. A 12. B 13. A 14. B 15. B 16. C 17. B 18. D 19. B 20. D