MHT CET 2026 Physics question

In case of perfectly elastic collision,

(A)the total kinetic energy before collision is equal to the total kinetic energy after collision.Correct
(B)the total kinetic energy before collision is less than total kinetic energy after collision.
(C)the total kinetic energy before collision is greater than the total kinetic energy after collision
(D)coefficient of restitution is equal to zero.

Answer: (A)

Solution

In a perfectly elastic collision both linear momentum and total kinetic energy are conserved, so the total kinetic energy before the collision equals that after it, option (A). (B) would require energy to be created, which is impossible. (C)

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Question ID VK-098426