Question

The potential energy of a body at height 'he' is 'x' joules, which it reaches to the ground its potential energy will become?

Answer 1

Let us assume that the potential energy at ground is U

we are given that potential energy at a height h is '$x$ '

we can write as $x= U+mgh$

$U=(mgh-x)$ J

hence, the potential energy at the ground is equal to $(mgh-x)joules$