# Potential energy

## Explanation

Potential energy is the energy of the system due to its position relative to other systems. A common example is the potential energy of everyday objects due to gravity. Another good example is the bowstring and the bow, which stores the energy as elastic potential energy and stress energy, to be later converted into kinetic energy to the arrow. Potential energy is measured in SI units as joule, J. 1 J is 1 kg m2 s−2.

$U = mgh$