Question

If g is the acceleration due to gravity on the earth's surface , the gain in the potential energy of a n object of mass m raised from the surface of the earth to a height equal to the radius R of the earth is ?Opt.)a)2mgR b)mgR/2 c)mgR/4 d)mgRPlease solve it step by step.

Answer 1

the formula for potential energy is mgh for any object even it is any height.
here, the height is R.
so, substitute R instead of h.
we get mgR.
therefore, d is the answer