Question

Expression for potential energy

Answer 1

Let the work done on the object against gravity $=W$

Work done, $W=force\times displacement$

Work done, $W=mg\times h$

Work done, $W=mgh$

Since workdone on the object is equal to $mgh$, an energy equal to mgh units is gained by the object . This is the potential energy $\left(E_p\right)$ of the object.

$E_p=mgh$