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Question

(B) The gravitational potential energy $(PE)$ of an object is given by the formula $PE = mgh$,where $m$ is the mass,$g$ is the acceleration due to gra

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person is lying on the ground

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(B) The gravitational potential energy $(PE)$ of an object is given by the formula $PE = mgh$,where $m$ is the mass,$g$ is the acceleration due to gravity,and $h$ is the height of the center of mass of the object from the reference level (ground).Since $m$ and $g$ are constant for a person,the potential energy depends directly on the height $(h)$ of the center of mass.When a person is lying on the ground,the height of their center of mass from the ground is the minimum compared to standing,sitting on the ground,or sitting on a chair.Therefore,the potential energy is minimum when the person is lying on the ground.

The potential energy of a person is minimum when:

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