1. Motion in One Dimension
Chapter 2
Motion in One Dimension

2. Question 1
During which time interval does the minivan move to the east?

3. Answer
0 – 40 s, 60 – 70 s

4. Question
During which time interval does the minivan move to the west?

5. answer
40 – 50 s, 50 – 60 s

6. question
Is the minivan’s speed between s greater than, less than, or equal to its speed between 20 – 30 s?

7. answer
Greater than

8. question
During which time intervals does the minivan stop completely?

9. answer
0 – 10 s, 50 – 60 s

10. answer
A juggler throws a ball straight up into the air. The ball remains in the air for 2.4 s before it lands back in the juggler’s hand. How much time elapsed before the ball reached its maximum height?

11. answer
1.2 s

12. question
A juggler throws a ball straight up into the air. The ball remains in the air for 2.4 s before it lands back in the juggler’s hand. With what speed does the juggler throw the ball into the air?

13. answer
11.8 m/s

14. question
During takeoff, a plane accelerates at 4 m/s2 and takes 40 s to reach takeoff speed. What is the velocity of the plane at takeoff?

15. answer
160 m/s

16. question
A car with an initial speed of 31.4 km/h accelerates at a uniform rate of 1.2 m/s2 for 1.3 s. What is the final speed of the car during this time?

17. answer
10.3 m/s

18. question
A car with an initial speed of 31.4 km/h accelerates at a uniform rate of 1.2 m/s2 for 1.3 s. What is the displacement of the car during this time?

19. answer
12.35 m

20. question
Is the car speeding up, slowing down, or at rest from 60 – 70 s?

21. answer
Slowing down

22. question
Is the acceleration in the positive or negative direction from 40 – 50 s?

23. answer
negative

24. Question
What is the speed from 20 – 30 s?

25. answer
15 m/s

26. question
What is the acceleration from 0 – 10 s?

27. answer
1 m/s2

28. question
A ball is thrown vertically upward. What is the ball’s velocity when it reaches its maximum altitude?

29. answer
0 m/s

30. question
A ball is thrown vertically upward. Does its acceleration increase, decrease, or remain constant?

31. answer
Remains constant

32. question
A rocket moves upward, starting from rest with an acceleration of 29.4 m/s2 for s. It runs out of fuel at the end of the 3.98 s but does not stop. How high does it rise above the ground?

33. answer
931 m

34. question
An elevator is moving upward at 1.20 m/s when it experiences an acceleration of m/s2 downward, over a distance of 0.75 m. What will be its final velocity?

35. answer
0.99 m/s

36. question
Which graph represents an object moving with a constant positive velocity?

37. answer II

38. question
Which graph represents an object at rest?

39. answer I

40. question
Which graph represents an object moving with constant positive acceleration?

41. answer IV

42. question
A bus travels from El Paso, Texas to Chihuahua, Mexico in 5.2 h with an average velocity of 73 km/h to the south. What is the bus’s displacement?

43. answer
380,000 m to the south

44. question Which of the following statements is true of acceleration?
Acceleration always has the same sign as displacement
Acceleration always has the same sign as velocity
The sign of acceleration depends on both the direction of motion and how the velocity is changing
Acceleration always has a positive sign

45. answer 3

46. question
A ball initially at rest rolls down a hill and has an acceleration of 3.3 m/s2. if it accelerates for 7.5 s, how far will it move during this time?

47. answer
93 m

48. question
Which of the following statements is true for a ball thrown vertically upward?
The ball has a negative acceleration on the way up and a positive acceleration on the way down.
The ball has a positive acceleration on the way up and a negative acceleration on the way down
The ball has zero acceleration on the way up and a positive acceleration on the way down.
The ball has a constant acceleration throughout its flight.

49. answer 4

50. question
A snowmobile travels in a straight line. The snowmobile’s initial velocity is +3 m/s. If the snowmobile accelerates at a rate of m/s2 for 7.0 s, what is its final velocity?

51. answer
+6.5 m/s

52. question
A snowmobile travels in a straight line. The snowmobile’s initial velocity is +3.0 m/s. If the snowmobile accelerates at a rate of m/s2 from its initial velocity of m/s, how long will it take to reach a complete stop?

53. answer
5.0 s

54. question
A car travels 5 m east, stops, turns around and travels 5 m west. What is the car’s displacement?

55. answer
0 m