Question

Prove that gravitational potential energy =mgh

Answer 1

Answer:

W = Fs Cos θ --------1

Let us modify 1

W = Mas Cos θ -----2

Here,

$M = m$

$a = g$

$s = h$

θ = $0^o$

Substituting  M,a,s and θ in 2, we get

$W=mgh$ cos $0^o$

$W= mgh$ (cos $0^0$ = 1) --------3

This work done is in form of PE

∴ $PE=mgh$ -------4