Question

The gravitational potential energy of a body of mass m at the earth's surface -mgre its gravitational potential energy at a height re from the earth's surface will be

Answer 1

The change in gravitational potential energy, ΔPEg, is ΔPEg = mgh, with h being the increase in height and g the acceleration due to gravity. The gravitational potential energy of an object near Earth's surface is due to its position in the mass-Earth system.