Which one of the following body is having highest potential energy at a fixed point ?

A body of mass 2 Kg is placed at a height of 6 m

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A body of mass 3 Kg is placed at a height of 2 m

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A body of mass 4 Kg is placed at a height of 4 m

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A body of mass 5 Kg is placed at a height of 3 m

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Solution

The correct option is C
A body of mass 4 Kg is placed at a height of 4 m
Potential Energy of a body of mass m at height h is mgh
g is the acceleration due to gravity.

The first option is $2 k g \times 6 m \times 10 m s^{- 2} = 120 J The second option is 3 k g \times 2 m \times 10 m s^{- 2} = 60 J The third option is 4 k g \times 4 m \times 106 m s^{- 2} = 160 J The fourth option is 5 k g \times 3 m \times 10 m s^{- 2} = 150 J Thus highest potential Energy is in case 3 i.e., 160 J$

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