Question

Derive an expression for the increase in potential energy of a body, when moved from a point at a distance r1 to a point at a distance r2​

Answer 1

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Required answer-:

Let a body of mass m be remaining at rest at a height h above the ground. The work done in raising the body from the ground to the height is stored up in the body as its potential energy and when the body falls to the ground, the same amount of work can be got back from it. Now in order to lift the body vertically up, a minimum force mg equal to the weight of the body should be exerted. Work done when the force moves vertically through a height h is

W = force x displacement = mg x h

Potential energy = mgh joule.

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Answer 2

Answer:

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