Question

Define potential energy. What is unit? Derive and expression for gravitational potential energy of an object of an object of mass 'm' at a height 'h' above the earth's surface.

Answer 1

the potential energy of an object due to change of shape and size its si unit is joule and the expression is potential difference =mgh

Answer 2

potential energy is the energy possessed by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.
the si unit of potential energy is Joule