A proton is moving toward a second, stationary proton. What happens as the protons get closer?
A. Kinetic energy is converted to electric potential energy, and the proton moves more slowly.
B. Electric potential energy is converted to thermal energy, and the proton moves more slowly.
C. Kinetic energy is converted to electric potential energy, and the proton moves more quickly.
D. Electric potential energy is converted to kinetic energy, and the proton moves more quickly.

A. Kinetic energy is converted to electric potential energy, and the proton moves more slowly.

Explanation:

When a moving proton is brought close to a stationary one, the kinetic energy of the moving one is converted to electric potential  and the proton moves more slowly.

Kinetic energy is the energy due to the motion of a body. A moving proton will possess this form of energy.

Two protons according to coulombs law will repel each other with an electrostatic force because they both have similar charges. This will increase their electric potential energy of both of them.

Potential energy is the energy at rest of a body. As it increases, the motion of a body will be slower and it will tend towards being stationary.

representative si the final answer! : )