Q. When a body is falling freely under gravity, the total mechanical energy remains constant because of which of the following?
✅ Correct Answer: (A)
law of conservation of energy
Explanation: according to the law of conservation of energy, energy can neither be created nor can it be destroyed but it can be changed from one form to another. when a body falls freely, under gravity, its potential energy gradually changes into kinetic energy. but its total mechanical energy remains constant at any point of its motion.