Question

In an elastic collision of two bodies

• A. Total momentum of the system remains conserved
• B. Total energy of the system remains conserved
• C. The kinetic energy before collision is equal to kinetic energy after collision
• D. The kinetic energy changes during collision stage

Answer 1

Answer: (A), (B), (C)

The kinetic energy before collision is equal to kinetic energy after collision

The correct options are (A), (B), and (C).

Inelastic collision, momentum, and kinetic energy are conserved during the collision.

(A) As total momentum is conserved during the elastic collision, option A is correct.

(B) Total energy is conserved during the collision. Hence option B is correct.

(C) As kinetic energy is conserved, kinetic energy before the collision is equal to energy after the collision. Option C is correct.

(D) As there is no net loss in kinetic energy during a collision, kinetic energy does not change. So option D is incorrect.

Hence, options (A), (B), and (C) are correct.