What is the gravitational potential energy of a # 12 kg# object on a shelf # 5/8 m # high?
Since the mass
Since this is energy, the unit is joules (J)
Derivation of the formula - a little bonus
We can think about this formula as the work done lifting an object.
When work is done lifting an object against its weight, the force work is done to is its weight.
Say the object is lifted a distance
This is equal to the gain in gravitational energy. Therefore: