E-PolyLearning

1. What is the change potential energy of a stone of mass 5 Kg that falls from a cliff 10 m high?
a. 5 J
b. 50 J
c. 500 J
d. 5000 J
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Answer: (c).500 J

2. What is the change in potential energy of a stone of mass 1 Kg thrown up with a Velocity 10 m/s and comes down?
a. 0
b. 10 J
c. 100 J
d. 500 J
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Answer: (a).0

3. A fluid in supplied to a cliff 10 m high, what is the change in specific potential energy of fluid?
a. 10 J/Kg
b. 100 J/Kg
c. 200 J/Kg
d. 500 J/Kg
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Answer: (b).100 J/Kg

4. A fluid is supplied to a cliff 20 m high and comes down by 5 m, what is the change in specific potential energy of fluid?
a. 100 J/Kg
b. 150 J/Kg
c. 200 J/Kg
d. 250 J/Kg
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Answer: (b).150 J/Kg

5. A ball is thrown up and someone catches it on the cliff, what is the change in potential energy?
a. Positive
b. Negative
c. Zero
d. Cannot say
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Answer: (a).Positive

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