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In which case does the potential energy decrease |
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a) |
On compressing a spring |
b) |
On stretching a spring |
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c) |
On moving a body against gravitational force |
d) |
On the rising of an air bubble in water |
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In which case does the potential energy decrease |
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a) |
On compressing a spring |
b) |
On stretching a spring |
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c) |
On moving a body against gravitational force |
d) |
On the rising of an air bubble in water |
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(d) In compression or extension of a spring work is done against restoring force In moving a body against gravity work is done against gravitational force of attraction It means in all three cases potential energy of the system increases But when the bubble rises in the direction of upthrust force then system works so the potential energy of the system decreases |