Question

Some of the kinetic energy of the runner's foot is wasted. In each step, this energy is transferred into?

A. Potential energy
B. Thermal energy
C. Chemical energy
D. Elastic energy

Answer 1

Some of the kinetic energy of the runner's foot is wasted. In each step, this energy is transferred into?

B. Thermal energy

Answer 2

When the runner's foot strikes the ground, the wasted kinetic energy is transferred into thermal energy.

Step-by-step explanation:

When a runner's foot strikes the ground, some of the kinetic energy is wasted. It is transferred into thermal energy, which is the energy associated with the random motion of particles. This happens due to the friction between the foot and the ground, causing the particles to vibrate and generate heat.