Question

derive the expression for gravitational potential energy of earth



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Answer 1

Explanation:

Near the surface of the Earth, the work done in lifting an object through a height h is the product mgh , so U=mgh . The gravitational potential energy, U , of a system of masses m1 and M2 at a distance r using gravitational constant G is U=−Gm1M2r U = − G m 1 M 2 r .

Answer 2

Explanation:

Considering mass "m" and height "h"

We have formula,

w=fh ........(1)

and

f=mg ........(2)

From (1) and (2), we have,

w=mgh

Gravitational potential energy is given by,

Ep=w

∴E p=mgh

Hence, this is the answer.