State the principle of conservation of mechanical energy and illustrate in the case of freely falling body.

State the principle of conservation of charge .

The state of a freely falling body is

State and explain the law of conservation of mechanical energy.

State Law of Conservation of Energy of mass.

Statement-1: Two particles moving in the same direction do not lose all their energy in a completely inelastic collision. Statement-2: Principle of conservation of momentum holds true for all kinds of collisions.

State and prove conservation of linear momentum in case of collision of two bodies.

State and illustrate the law of conservation of linear momentum for any two colliding particles in a closed system.