https://www.pinterest.com/johndonaldson14/energy/
I mentioned early that a bow can be considered to behave
similarly to a spring. This profound aspect of this comes in
the form of energy. The bow stores energy as potential
energy as it is drawn. When the bow is released that
potential energy is converted into kinetic energy which
moves; the bow, arrow and string. Some energy is also
converted to heat in the limbs from their deformation.
The basic energy transformations in any system are between; potential energy, kinetic energy and thermal energy. For more information on these transformations see a handbook of physics, other reference source. Consider starting here.