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S9 Motion Test Review
SHOW WORK TO RECEIVE FULL CREDIT! ROUND TO NEAREST HUNDRETH.
1. A car traveled 45 km in 2 hours, 64 km in the next 1 hour, and then 84 km in 2 hours before reaching its destination.
What was the car’s average speed?
2. What is the speed of a bobsled whose distance-time graph indicates that it traveled 50 m in 25 seconds?
3. Which example identifies a change in motion that produces acceleration?
a.
a speed skater moving at a constant speed on a straight track
b.
a car speeding up as it went through a green light
c.
a particle moving in a vacuum at constant velocity
d.
a vehicle moving down the street at a steady speed
4. Acceleration is a change in velocity. List all ways that an object can accelerate.
5. Suppose you increase your speed on your bike from 5 m/s to 7 m/s in a period of 2 second. What is your acceleration?
6. An object moving at 45 m/s takes 5 seconds to come to a stop. What is the object’s acceleration?
7. During a race, a runner runs at a speed of 4 m/s. 2 seconds later, she is running at a speed of 6 m/s. What is the
runner’s acceleration?
8. If you ride your bike at an average speed of 7 km/h and need to travel a total distance of 56 km, how long will it take
you to reach your destination?
9. A car traveling at 80 m/s starts to decelerate steadily. It comes to a complete stop in 20 seconds. What is its
deceleration?
10. A car’s average speed is 100 km/hr. If a trip takes 6 hours, how far did the car travel?
11. You traveled 63 kilometers in 0.7 hours, followed by 84 kilometers in 0.9 hours.
A) What was the speed of the first part of the trip?
B) Second part of the trip?
C) What is the average speed for the entire trip?
12. An Olympic swimmer swims 60 meters in 34 seconds. What is her average speed?
13. What is the potential energy of a 150 kg rock resting at the top of a 300 meter cliff?
14. What is the kinetic energy of a 70 kg jogger running at 4 meters/second?
15. Use the graph for the following questions:
A) What is the average velocity for the last five hours? (hour 7 to hour 12)
B) What is the lowest velocity shown during the first five hours?
C) What is the average velocity for the whole twelve hours?
D) What does the slope of a distance time graph tell you?
16. In the graph below use the following words to describe the motion of each segment. Words will be used more than
once: accelerating, decelerating, constant speed, at rest.
a. Segment O to A
b. Segment A to B
c. Segment B to C
d. Segment C to D
e. Segment D to E
f. Segment E to F
g. What does the slope of a speed-time graph tell you?
17. Use the picture above to answer the 4 questions below.
a.
Where is the potential energy the greatest?
b.
Where is the potential energy the lowest?
c.
Where is the kinetic energy the greatest?
d.
Where is the kinetic energy the lowest?
18. Tara goes on a camel safari in Africa. She travels 5 km north, then 3 km east and then 5 km south.
a. What distance did she cover?
b. What was her displacement?
19. Anthony walks to the pizza place for lunch.
He starts at A then walk 1 km east to B, then 5 km south to C.
a. What distance did he cover?
b. Draw the displacement vector.
20. For the following diagram, a 25kg ball is being dropped from the height of 15 meters. At the height of 15 meters, the
ball is at rest waiting to fall. Calculate the potential and kinetic energies at each height indicated in the diagram.