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Question

# Name the type of energy (kinetic energy K or potential energy U) possessed in the following case.A piece of stone placed on the roof.

A
U
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B
K
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C
U and K
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D
No energy
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Solution

## The correct option is C UWhen a stone is placed at the roof it is at a certain height that is given by U=m×g×hAs we have a certain value for h there would be some value for potential energy.As the stone is at rest at the roof it will not have any kinetic energy as its velocity is zero, K=1/2(m×v2)=0.Hence, only potential energy will be there.

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