Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
Concept Review
Velocity Problems
1. Various types of tree sloths share the honor of being the slowest-moving
mammals. An average tree sloth moves at a speed of 0.743 m/s. How long
does it take a sloth moving at this speed to travel 22.30 m?
2. The cheetah, the fastest of land animals, can run 274 m in 8.65 s at its top
speed. What is the cheetah’s top speed?
Slope Problems
3. Find the slope of a line that runs through the points (1, 2) and (6, 3).
4. Suppose you have a line graph with kilometers on the y-axis and minutes on
the x-axis. If your line indicates that in 2.0 min you travel 0.4 km and in
5.0 min you travel 1.0 km, what is the slope of the line?
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science Spectrum
2
Motion
Name ______________________________ Class ___________________ Date __________________
Section: Acceleration
5. Calculate the average acceleration of a car that changes speed from 0 m/s to
15 m/s in 5 s.
6. Explain why you are always accelerating when you ride a merry-go-round,
even though the speed of the merry-go-round does not change.
_______________________________________________________________
_______________________________________________________________
7. Graph the data from the table below onto a speed vs. time graph. Label
both axes. Plot all the data points and draw a straight line connecting them.
Car Speed
Time (s)
Speed (m/s)
0
0
1
7.5
2
15.0
3
22.5
4
30.0
a. Determine the car’s acceleration.
_______________________________________________________________
8. Calculate how long it takes for a stone falling from a bridge with an average
acceleration downward of 9.8 m/s2 to hit the water. The stone starts from rest
and hits the water with a velocity of 12.3 m/s.
9.Identify the straight-line accelerations below as either speeding up or slowing
down.
_____________________ a. 0.75 m/s2
_____________________ b. 24.8 m/s2
_____________________ c. –3.9 m/s2
_____ 10. Speeding up, slowing down, and changing direction is best described as
a. velocity.
b. distance.
c. displacement. d. acceleration.
_____ 11. When centripetal acceleration occurs, an object
a. speeds up. b. slows down. c. changes direction. d. is stationary.
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science Spectrum
3
Motion
Name ______________________________ Class ___________________ Date __________________
_____ 12. The equation for finding average acceleration for straight-line motion is
a. initial velocity – final velocity  time.
b. final velocity – initial velocity/time.
c. initial velocity + final velocity + time.
d. initial velocity + final velocity – time.
_____ 13. Moving from 0 m/s to 25 m/s in 8.0 s equals an average acceleration of
a. 0.32 m/s.
b. 0.32 m/s2.
c. 3.1 m/s.
d. 3.1 m/s2.
_____ 14. A cyclist is traveling at an initial speed of 10.0 m/s. She accelerates at a
rate of 0.500 m/s2. What is her final speed after 9.0 s?
a. 14.5 m/s
b. 14.5 m/s2
c. 5.5 m/s
d. 5.5 m/s2
_____ 15. Peter runs in a constant direction on a straight road. The velocity vs.
time graph of Peter’s motion shows a straight line with a negative
slope. What does the line tell you about Peter’s speed?
a. It is increasing.
c. It is decreasing, then increasing.
b. It is decreasing.
d. It is constant.
_____ 16. When velocity changes by the same amount over each time interval,
acceleration is
a. zero.
b. constant.
c. positive.
d. negative.
_____ 17. On a velocity vs. time graph, what shows the value of the acceleration?
a.the slope of the line
c. the y-axis
b.the x-axis
d. the final velocity
_____ 18. A cheetah can accelerate at up to 6.0 m/s2. How long does it take for a
cheetah to speed up from 10.5 m/s to 12.2 m/s?
a. 0.28 s
b. 1.7 s
c. 3.5 s
d. 10 s
_____ 19. What happens when a car slows down and velocity changes?
a. positive acceleration
c. negative acceleration
b. resultant acceleration
d. constant acceleration
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science Spectrum
4
Motion