1. Motion Review Challenge

2. What is the total distance traveled?
Start
Finish
10 m
6 m
4 m
15 m
Ans. 45 m

3. What is the displacement?
Start
Finish
10 m
6 m
4 m
15 m
Ans. 5 m right

4. Who is moving faster?
position
time
Sam
Sally
Ans. Sally

5. Who starts out ahead?
Sally
Sam
position
time
Ans. Sally

6. What is Sam’s speed? Ans. 2 m/s position (m) time (s) Sam 16 2 4 6 810 12 14 18 24 32
Ans. 2 m/s

7. What is Sally’s speed at t = 8 s?32 24
Sally
velocity
(m/s) 16 8 2 4 6 8 10 12 14 16 18
time (s)
Ans. 16 m/s

8. What is the displacement?
position
(m)
time (s) 16 2 4 6 8 10 12 14 18 24 32
Ans. +8 m

9. What is the total distance traveled?32 24
position
(m) 16 8 2 4 6 8 10 12 14 16 18
time (s)
Ans. 48 m

10. What is the average speed for the first 10 seconds?
position
(m)
time (s) 16 2 4 6 8 10 12 14 18 24 32
Ans m/s

11. What is the fastest speed traveled?
position
(m)
time (s) 16 2 4 6 8 10 12 14 18 24 32
Ans. 10 m/s

12. What is the displacement?
velocity
(m/s)
time (s) 16 2 4 6 8 10 12 14 18 -2 -4
Ans. 36 m

13. What is the velocity of the object at t = 11 s?
(m/s)
time (s) 16 2 4 6 8 10 12 14 -2 -4
Ans. -3 m/s

14. What is the displacement of the object for the entire trip?4 2
velocity
(m/s) -2 -4 2 4 6 8 10 12 14 16
time (s)
Ans. 12 m

15. What is the acceleration of the object?4 2
velocity
(m/s) -2 -4 2 4 6 8 10 12 14 16 18
time (s)
Ans. 0

16. What is the acceleration of the object?4 2
velocity
(m/s) -2 -4 2 4 6 8 10 12 14 16
time (s)
Ans. 1/3 m/s2

17. What is the object doing?4 2
velocity
(m/s) -2 -4 2 4 6 8 10 12 14 16
time (s)
Ans. Slowing down

18. What is the object doing?4 2
velocity
(m/s) -2 -4 2 4 6 8 10 12 14 16
time (s)
Ans. Speeding up

19. Ans. D

20. Ans. C

21. Ans. E

22. Ans. B

23. Ans. D

24. Ans. B

25. Ans. D

26. What is the velocity of the object?
Ans. 32 m/s
Position (m)
Time (s)

27. Describe (in words) how to match this graph.4 2
velocity
(m/s) -2 -4 2 4 6 8 10 12 14 16 18
time (s)
Ans. Move away from detector at constant speed of 2 m/s for 9 s, then move toward detector at constant speed of 1 m/s for 9 s

28. Describe (in words) how to match this graph.
position
(m)
time (s) 16 2 4 6 8 10 12 14 18
Ans. Move forward at constant speed (4/9 m/s) for 9 s, stop moving for 4 s, then move forward at constant speed (1 m/s) for 2 s