Unit 2: 1-Dimensional Motion
Name: ______________________________
Date: ________________ Targets:________
Exam Review Guide
Each of the four motion diagrams below shows the position of an object at successive 1-s time intervals Use the
following diagrams to answer questions 1 - 4.
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C
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4.
END
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° ° ° °°° ° °
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Which diagram shows an object with constant positive acceleration?
Which diagram shows an object with zero acceleration the entire time?
Which diagram shows an object with constant positive velocity?
Which diagram shows an object with initial constant velocity followed by a decrease in velocity?
Identify the following as either a vector (V) or scalar (S) quantity for questions 5 – 11.
5. Distance
6. Position
7. Velocity
8. Speed
9. Displacement
10. Time
11. Acceleration
12. What is the average speed for Frank if he ran 50.0 meters in 5.0 seconds?
13. If Frank runs at an average speed of 4.5 m/s, how many seconds will it take Frank to run 180 meters?
14. A car accelerates from 0 m/s to 21.0 m/s in a time of 5.75 seconds. Determine the average acceleration
of the car over this time period.
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Use the following position vs. time graphs to answer questions 15 - 20.
A
B
C
15. Which graph(s) show a constant velocity?
16. Which graph(s) show an object moving away from the origin?
17. Which graph(s) show an object moving toward the origin?
18. In which graph(s) is the instantaneous velocity equal to the average velocity during all time periods?
19. In which graph(s) is the acceleration zero?
20. In which graph(s) do you need to draw a line tangent to a point on the curve to determine instantaneous
velocity?
Use the following velocity vs. time graphs to answer questions 21 - 25.
A
B
C
21. Which graph(s) have relatively constant acceleration the entire time?
22. Which graph(s) have positive acceleration the entire time?
23. Which graph(s) have negative acceleration entire time?
24. Which graph(s) are moving toward the origin (motion detector)?
25. Which graph(s) are moving away from the origin (motion detector)?
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Refer to the following velocity vs. time graph for questions 26-30.
26. What is the acceleration of the object from 15 minutes to 30 minutes?
27. What is the acceleration of the object from 30 minutes to 40 minutes?
28. What is the displacement of the object between 10 and 15 minutes?
29. What is the displacement of the object between 30 and 40 minutes?
30. What is the instantaneous acceleration of the object at 30 minutes?
31. A speedometer is placed upon a free-falling object in order to measure its instantaneous speed during
the course of its fall. Its speed reading (neglecting air resistance) would increase each second by ____.
a. about 5 m/s
b. about 10 m/s
c. about 15 m/s
d. a variable amount
e. depends on its initial speed
32. Ten seconds after being dropped from rest, a free-falling object will be moving with a speed of ____.
f. about 10 m/s
g. about 50 m/s
h. about 100 m/s
i. more than 100 m/s
33. When a rock is dropped, it will accelerate downward at a rate of 9.8 m/s2. If the same rock is thrown
downward (instead of being dropped from rest), it acceleration will be ____. (Ignore air resistance
effects.)
j. less than 9.8 m/s2
k. 9.8 m/s2
l. more than 9.8 m/s2
For the following problems draw a picture and a coordinate system for each scenario.
34. How far will a brick starting from rest fall freely in 3.0 seconds?
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35. A car initially traveling at a speed of 16 meters per second accelerates uniformly to a speed of 20.0
meters per second over a distance of 36 meters. What is the magnitude of the car’s acceleration?
36. A skater increases her speed uniformly from 2.0 meters per second to 7.0 meters per second over a
distance of 12 meters. The magnitude of her acceleration as she travels this 12 meters is _____.
37. A ball thrown vertically upward reaches a maximum height of 30.0 meters above the surface of Earth.
At its maximum height, the speed of the ball is _____.
38. While standing at the top of the bleachers at CLC you throw a tennis ball straight down towards the
ground, attempting to hit an ant on the ground. If your throw the ball with an initial velocity of 10 m/s
downward and it hits in 1.5 seconds, how high were you off the ground?
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