A block is moving with 52.0 J of KE. A 12.0 N force pulls the block straight back, against the motion, for 3.00 m. How much Work was done on the block? What is its final KE?

Physics for Scientists and Engineers, Technology Update (No access codes included)
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Chapter7: Energy Of A System
Section: Chapter Questions
Problem 7.44P: (a) Suppose a constant force acts on an object. The force does not vary with time or with the...
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1. A car starts at rest, and ends up with 1500 J of KE. How much Work was done on it?
2. A motorcycle at rest has 550 J of Work done on it. What is its final KE?
3. A runner has 250 J of KE. A short time later, he has 350 J of KE. How much Work was
done on him?
4. A runner has 250 J of KE. A short time later, he has 150 J of KE. How much Work was
done on him?
5. A 0.150 kg baseball is moving 30.0 m/s. How much KE does it have?
6. A 0.150 kg baseball is moving 20.0 m/s. A bat hits it, doing 15.0 J of Work on it. What is
the final KE of the ball?
7. A block is at rest. A 40.0N force directed 38.0° above horizontal pulls the block 8.00 m
across flat ground. How much Work was done on the block? What is its final KE?
8. A block is moving with 52.0 J of KE. A 12.0 N force pulls the block straight forward for 3.00
m. How much Work was done on the block? What is its final KE?
9. A block is moving with 52.0 J of KE. A 12.0N force pulls the block straight back, against the
motion, for 3.00 m. How much Work was done on the block? What is its final KE?
10. A 5.00 kg block is moving 6.00 m/s. A short time later, it is moving at 8.00 m/s. What
was the starting KE? What was the final KE? How much Work was done on the
block?
Transcribed Image Text:1. A car starts at rest, and ends up with 1500 J of KE. How much Work was done on it? 2. A motorcycle at rest has 550 J of Work done on it. What is its final KE? 3. A runner has 250 J of KE. A short time later, he has 350 J of KE. How much Work was done on him? 4. A runner has 250 J of KE. A short time later, he has 150 J of KE. How much Work was done on him? 5. A 0.150 kg baseball is moving 30.0 m/s. How much KE does it have? 6. A 0.150 kg baseball is moving 20.0 m/s. A bat hits it, doing 15.0 J of Work on it. What is the final KE of the ball? 7. A block is at rest. A 40.0N force directed 38.0° above horizontal pulls the block 8.00 m across flat ground. How much Work was done on the block? What is its final KE? 8. A block is moving with 52.0 J of KE. A 12.0 N force pulls the block straight forward for 3.00 m. How much Work was done on the block? What is its final KE? 9. A block is moving with 52.0 J of KE. A 12.0N force pulls the block straight back, against the motion, for 3.00 m. How much Work was done on the block? What is its final KE? 10. A 5.00 kg block is moving 6.00 m/s. A short time later, it is moving at 8.00 m/s. What was the starting KE? What was the final KE? How much Work was done on the block?
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