# Difference between revisions of "Potential energy"

Potential energy is energy that is stored in an object. An example is gravitational potential energy such as that of a roller coaster train at the peak of its lift hill.[1]

The formula for gravitational potential energy for two point masses is:



where

 is Newton's gravitational constant
 and  are the masses of the two particles
 is their separation

If one particle moves a radial distance (towards or away) from the other a distance  and , then the change in potential  can be approximated by



where  is the gravitational field strength in the vicinity of the initial and final points.