What is Gravitational Potential Energy?
Gravitational potential energy = energy stored within an object as it is raised to a height against the force of gravity
GPE is alos a way of storing kinetic energy- to lift something, you increase its GPE. This energy is then only released when the object falls, and so is converted into kinetic energy.
Change in GPE (Joules, J) = Weight (Newtons, N) x Change in height (Metres, m)
E.g. A 80kg jumps to a height of 2m on a trampoline. Calculate his change in GPE
(80x10) x 2 = 1,600J (remember, you may need to convert kg in N)