Question

state the principle of conservation of mechanical energy and illustrate in case of freely falling body ​

Answer 1

Answer:

Law of conservation of energy states that the energy of a system is always constant. In other words, we can say that energy can neither be created nor destroyed. ... Mechanical energy (E) is the sum of the potential energy (U) and the kinetic energy (K) of the freely falling body. Therefore, E=K+U=constant.

Answer 2

Answer:

Principle: The total mechanical energy of a system is conserved i.e., the energy can neither be created nor be destroyed; it can only be internally converted from one form to another if the forces doing work on the system are conservative in nature.