Question

State the Law of Conservation of Mechanical Energy. What is the essential condition for it?

Answer 1

Law of Conservation of Mechanical Energy:

1. The law of conservation of mechanical energy states that the energy can neither be created nor be destroyed; it can only be internally converted from one form to another.
2. The only condition under which mechanical energy is conserved is that all the forces acting on it should be conservative forces.

Example: A simple example of the conservation of mechanical energy is a rock allowed to fall due to Earth's gravity from a height h above the ground.