Example Problem
A 5kg medicine ball is lifted from the floor to .7 meters off the floor. What is the gravitational potential energy relative to the floor?

external image Man%20holding%20medicine%20ball.jpg

Solution
Given: Mass = 5kg
Height = 0.7 m
Acceleration due to gravity = 9.8m/s2

Unknown: potential energy, EP

Basic equation: EP = mgh

Solution: Ep = mgh = (5kg)(9.8m/s2)(0.7m) = 34.3 J