The potential energy of a body at rest is minimum when:

At an edge of a cliff

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On the fourth floor of a building

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On a rollercoaster

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Placed on the ground

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Solution

The correct option is D
Placed on the ground

Potential energy will be least when the height from the ground is minimum. The height of a body refers to the height of the centre of the body. When the person lies down, the centre of the body is at a height lower than that in the other cases. Hence, the potential energy is minimum in that case.

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Similar questions

Two boys were playing with the same ball on a level ground. One of the boys throws the ball on the third floor of the building which is at a height of 5 m and the other boy manages to throw on the fourth floor which is at a height of 7 m from the level ground. Then the ratio of the potential energy gained by the ball in both cases is:

When a body falls on the ground from the top of a building and stops, the law of conservation of energy is violated.

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Two boys were playing with a ball on a level ground. One of the boys throws the ball on the third floor of the building which is at a height of 5 m and the other boy manages to throw on the fourth floor which is at a height of 7 m from the level ground. Find the ratio of the work done by both the boys?

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