Elastic collisions between two bodies satisfy all of the following except A) relative velocity of approach = relative velocity of separation. B) relative speed of approach = relative speed of separation. C) momentum is conserved. D) kinetic energy is conserved.

Question

Quizplus · Accepted Answer

In an elastic collision, while the relative speed of approach equals the relative speed of separation, and both momentum and kinetic energy are conserved, the statement about relative velocity of approach being equal to relative velocity of separation is not always true because it does not account for direction; only the magnitudes (speeds) are guaranteed to be equal.

Elastic Collisions Between Two Bodies Satisfy All of the Following