Q122 / 150 · MHT CET 2026 (15 April Shift 2) · Physics
In case of perfectly elastic collision,
- Correct answerAthe total kinetic energy before collision is equal to the total kinetic energy after collision.
- Bthe total kinetic energy before collision is less than total kinetic energy after collision.
- Cthe total kinetic energy before collision is greater than the total kinetic energy after collision.
- Dcoefficient of restitution is equal to zero.
Solution
In a perfectly elastic collision, there is no loss of kinetic energy during the impact.
Therefore, the total kinetic energy of the system before the collision is exactly equal to the total kinetic energy of the system after the collision.
Additionally, the coefficient of restitution for a perfectly elastic collision is $e = 1$.
Therefore, the total kinetic energy of the system before the collision is exactly equal to the total kinetic energy of the system after the collision.
Additionally, the coefficient of restitution for a perfectly elastic collision is $e = 1$.
Hence, the correct answer is option: 'A'.