Question

when an archer pulls back on a bow, energy is stored in the stretched bowstring. when the arrow is released, what happens?
kinetic energy transforms into potential energy.
potential energy in the bow transforms into kinetic energy of the arrow
energy is destroyed once the arrow leaves the bow.
thermal energy is created in the bowstring and arrow.

Explanation:

When the archer pulls the bow, elastic - potential energy is stored in the bowstring. When the arrow is released, according to the law of conservation of energy, this potential energy is converted into the kinetic energy of the moving arrow. Energy cannot be created or destroyed (excluding the small amount converted to heat due to friction which is negligible in this basic analysis).

Answer:

Potential energy in the bow transforms into kinetic energy of the arrow