1. Ch. 4 Review Game Fun in B206! Pick up Study Guide!

2. Speed that does not change is called: A. average speed. B. constant speed. C. instant speed. D. minimum speed. 2

3. Displacement vectors of 5 km south, 3 km north, 1 km south, and 2 km north combine to a total displacement of A. 1 S B. 2 S C. 3 S D. 4 S 3

4. Variables like velocity and acceleration that have both size and direction are called: a. vectors. b. dependent. c. axes. d. independent. 4

5. Speed is the ratio of the distance an object moves to A. the time needed to travel. B. the direction the object moves. C. the displacement of the object. D. the motion of the object. 5

6. What is the slope of a line on a distance-time graph? A. distance. B. time. C. speed. D. displacement. 6

7. A horizontal line on a distance-time graph means the object is A. moving at a constant speed. B. moving faster. C. slowing down. D. at rest. 7

8. The gain in speed each second for a freely falling object is about A. about 0 m/s. B. about 5 m/s. C. about 10 m/s. D. depends on the initial speed. 8

9. The rate at which velocity changes is called A. acceleration. B. motion. C. vectors. D. speed. 9

10. A car approaching a school changes speed from 10 m/s to 5 m/s in 5 s. How can the car’s acceleration be described? A. The acceleration is positive B. It is not accelerating. C. It will come to rest in 5 seconds. D. The acceleration is negative. 10

11. An object that is accelerating may be A. slowing down. B. gaining speed. C. changing direction. D. all of the above 11

12. A freely falling objects speed is a. constant. b. increasing. c. decreasing. d. directional. 12

13. After starting from rest, a freely falling object accelerates at a a. constant rate. b. increasing rate. c. decreasing rate. d. changing rate. 13

14. Which of the following is a projectile? A. A book sliding across a desk. B. A golf ball rolling across a green. C. A soccer ball kicked into the air. D. A dog in a tree. 14

15. What is happening at point A in this speed vs. time graph? a. Positive acceleration b. Zero acceleration c. Negative acceleration d. Constant speed. 15 A B C

16. What is happening at point B in this speed vs. time graph? a. Positive acceleration b. Zero acceleration c. Negative acceleration d. Constant speed. 16 A B C

17. What is happening at point C in this speed vs. time graph? a. Positive acceleration b. Zero acceleration c. Negative acceleration d. Constant speed 17 A B C

18. What is the slope of this position vs. time graph? a. 5 m/s b. 50 m/s c. 500 m/s d. 50 m 18

19. What is the acceleration of a lawn mower that starts at a speed of 4 m/s and speeds up to 10 m/s in 3 minutes? A. 3 m/min B. 2 m/min C. -2 m/min D. 6 m/min 19

20. What distance can a car go in 60 seconds if it’s speed is 3 meters per second? A. 12 meters B. 0.05 meters C. 120 meters D. 20 meters 20

21. How long does it take a person to get to school (5 miles away) if they travel at 35 mph? A. 0.5 hours B. 7 hours C. 175 hours D. 0.14 hours 21

22. What is the initial velocity of a scooter if it has a final velocity of 6 m/hr after 2 hours and they accelerate at 1.5 m/hr/s A. 1 m/hr B. 2 m/hr C. 3 m/hr D. 4 m/hr 22