Answer:
A. In a closed system, the potential energy at the bottom is equal to the kinetic energy at the top.
Explanation:
According to the law of conservation of energy, energy is neither created nor destroyed but transformed from one form to another.
- Potential energy is the energy due to the position of a body
- Kinetic energy is the energy due to the motion of a body.
Based on the premise of the law of conservation of energy, both kinetic energy and potential energy are equal at the top and bottom in the system.
This way energy is conserved.
