In a game of pool,the white cue ball hits the #5 ball and stops,while the #5 ball moves away with the same velocity as the cue ball had originally.Both balls have the same mass.This type of collision is
A)somewhat inelastic.
B)elastic.
C)completely inelastic.

Question

Quizplus · Accepted Answer

In an elastic collision, the total kinetic energy of the system is conserved. In this case, since the #5 ball moves away with the same velocity as the cue ball originally had, we can conclude that the total kinetic energy of the system before and after the collision is the same, which indicates an elastic collision. Therefore, the best choice is B.

In a Game of Pool,the White Cue Ball Hits the #5