Assertion : In elastic collision, kinetic energy is conserved.
Reason : Energy is always conserved.

The kinetic energy is conserved in

The kinetic energy is not conserved in

During collision kinetic energy is conserved at each instant

An elastic collision conserves

In the following question, a statement of Assertion is followed by a statement of Reason. Mark the correct choice. Assertion: In an elastic collision of two billiard balls are in contact with each other. During the short time of collision, kinetic energy is conserved. Reason: Energy, spent against friction does not follow the law of conservation of energy

In an elastic collision which quantities are conserved ?

In non-elastic collision, both momentum and kinetic energy are conserved.