1. Starting from rest, an onject rolls freely down an incline that is 10 m long in 2.0 s. The acceleration
of the object is
5 m/s 5 m/s² 10 m/s 10 m/s²

2. An object, initially at rest, falls freely near the earth?s surface. How long does it take the object to reach
a speed of 98 m/s ?
0.1 s 10 s 98 s 960 s

3. A rock is dropped from a cliff. Approximately how long does it take to fall 45 m ?
1.0 s 5.0 s 3.0 s 8.0 s

4. What is the speed of a rock, initially at rest, that has fallen 66 m near the Earth?s surface ?
25 m/s 36 m/s 96 m/s 1300 m/s

5. An astronaut drops a rock from rest on the Moon?s surface. How far will the rock fall in 2.0 s ? (Acceleration due to gravity on the Moon is 1.6 m/s²)
3.2 m 1.6 m 32 m 2.4 m

6. A student drops an object from the top of a building which is 19.6 m high. How long does it take the object
to fall to the ground ?
19.6 s 2.00 s 3.00 s 4.00 s

7. A cart initially traveling at 10 m/s accelerates uniformly at 3.0 m/s² for 4.0 s. The distance traveled by the cart at the end of this 4.0 s is
40 m 64 m 88 m 180 m

8. An object is allowed to fall freely near the surface of a planet. The object falls 54 m in the first 3.0 s.
The acceleration due to gravity on that planet is
6.0 m/s² 12 m/s² 27 m/s² 108 m/s²

9. An object initially at rest accelerates at 5.0 m/s² until it attains a speed of 30 m/s. What distance does the object move while accelerating ?
30 m 90 m 3 m 600 m

10. An object initially traveling at 20. m/s west decelerates uniformly at 4.0 m/s² for 2.0 s. The displacement of this object is
32 m east 32 m west 48 m east 48 m west

Base your answers to questions 11 through 16 on the speed-time graph below representing the motion of a cart.



11. The cart travels the shortest distance in interval
0-5 s 5-8 s 8-11 s 11-16 s

12. The cart?s average speed is greatest during interval
0-5 s 5-8 s 8-11 s 11-16 s

13. The cart travels the greatest distance during interval
0-5 s 5-8 s 8-11 s 11-16 s

14. The magnitude of the cart?s acceleration is greatest during interval
0-5 s 5-8 s 8-11 s 11-16 s

15. During how many intervals is the cart?s acceleration equal to zero ?
1 2 3 4

16. What is the distance traveled by the object during the time interval 8 to 11 seconds ?
30 m 60 m 90 m 180 m

 

17. An object initially traveling in a straight line with a speed of 5.0 m/s is accelerated at 2.0 m/s² for 4.0 s. The total distance traveled is
36 m 24 m 16 m 4.0 m

Base your answers to questions 18 through 20 on the distance-time graph below representing the motion of an object.



18. What is the average speed of the object between 3 and 7 seconds ?
10. m/s 2.5 m/s 5.0 m/s 15 m/s

19. What is the average speed of the object between 7 and 9 seconds ?
10. m/s 2.5 m/s 5.0 m/s 0 m/s

20. During which interval is the object?s speed greatest ?
1 ? 3 s 3 ? 7 s 7 ? 9 s 9 ? 12 s

21. Which of the graphs below best represents an object falling freely near the surface of the Earth ?



A B C D

22. A boat initially traveling at 10. m/s accelerates uniformly at the rate of 5.0 m/s² for 10. s. How far does the boat travel during this time ?
50. m 250 m 350 m 500 m

23. A clam dropped by a seagull takes 3.0 s to hit the ground. What is the sea gull's approximate height above the ground at the time the clam was dropped ?
15 m 30. m 45 m 90. m

24. A skier starting from rest skis straight down a slope 50. m long in 5.0 s. What is the magnitude of the acceleration of the skier ?
20. m/s² 9.8 m/s² 5.0 m/s² 4.0 m/s²

25. A car moving at a constant speed of 4.10 m/s then accelerates uniformly at 3.20 m/s². What will be its speed when it has traveled a distance of 40.0m ?
8.50 m/s 16.5 m/s 24.5 m/s 273 m/s