Answer: chemical energy to mechanical energy
Explanation: potential energy is the energy a body has when it's at rest it a mean position.
Kinetic energy is the energy a body posses when it's in motion or been heated
For a person taking a race course, he is first at a resting position possessing potential energy in form of chemical energy is now been converted to mechanical energy which is used to run.
Energy is stored as chemical energy in the body because it is gotten from food and water eaten.
When activities are been carried out it is converted to kinetic energy
