Fair Bonus Question: Derive the equation for gravitational potential energy, starting with the definition of work.

Work is the product of force and displacement.

Gravitational potential energy is the potential an object has to do work as a result of being located at a particular position in a gravitational field. It can be calculated by using the following equation:

G. P. E=mxgxh where G. P. E is gravitational potential energy in joules, m is the mass of object in kilograms, g is gravitational field strength in Newton's per kilogram and h is height in metres.