in what cases is kinetic energy conserved?

Question

Is Kinetic Energy conserved in an elastic collision? an inelastic collision? neither? or both?

Answer 1

Kinetic energy can be passed from one object to another. In the game of billiards, the player gives kinetic energy to the cue ball by striking it with the cue stick. If the cue ball collides with another ball, it will slow down dramatically and the ball it collided with will accelerate to a speed as the kinetic energy is passed on to it. Collisions in billiards are effectively elastic collisions, where kinetic energy is preserved.

Answer 2

it is conserved in elastic collision and is not coserved in inelastic collision