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Question

Gravitational potential energy of an object of mass m at a height h from the surface of the earth, where h is small compared to radius of earth is .
  1. mgh
  2. GMm/h
  3. GMg


Solution

The correct option is A mgh
When h is small compared to the radius R of the earth, we assume g  (acceleration due to gravity) to be constant and  therefore, the gravitational potential energy is given by mgh.

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