A woman runs as shown.

Question

What main energy conversion occurs?

(1 point)
Responses

Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion.
Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion.

Mechanical energy changes into thermal energy because the energy from motion creates heat in the air around the runner.
Mechanical energy changes into thermal energy because the energy from motion creates heat in the air around the runner.

Mechanical energy changes into chemical energy as the kinetic energy from motion creates reactions in the surrounding air.
Mechanical energy changes into chemical energy as the kinetic energy from motion creates reactions in the surrounding air.

Thermal energy changes into mechanical energy because heat provides energy for motion.
Thermal energy changes into mechanical energy because heat provides energy for motion.

Answer 1

The correct response is:

Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion.

This reflects the transformation of energy from the food the woman has consumed (chemical energy) into the energy used to power her running (mechanical energy).