Question

In an elastic collision

• A. The initial kinetic energy is equal to the final kinetic energy
• B. The final kinetic energy is less than the initial kinetic energy
• C. The kinetic energy remains constant
• D. The kinetic energy first increases then decreases.

Answer 1

The correct option is A The initial kinetic energy is equal to the final kinetic energy

Velocity of seperation equals velocity of approach, Thus KE remains conserved.

NOTE : Kinetic energy remaining conserved does not mean it remains constant.