# What is the gravitational potential energy of a # 12 kg# object on a shelf # 5/8 m # high?

##### 1 Answer

Apr 14, 2018

#### Explanation:

Take

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: