During a game of pool at the Catskeller you carefull hit the white cue ball so t

Question

During a game of pool at the Catskeller you carefull hit the white cue ball so that it hits the black 8 ball dead center. You notice that the cue ball comes to an immediate stop and the 8 ball goes off with the same velocity. Which of the following observations is NOT true: A.The cue ball and the 8 ball both accelerate during the collision. B.The cue ball exerts a larger force on the 8 ball than the 8 ball exerts back on the cue ball. C.The kinetic energy of the cue ball before the collision is exactly the same as the kinetic energy of the 8 ball after the colilsion. D.The momentum of the cue ball before the collision is exactly the same as the momentum of the 8 ball after the collision.

Explanation / Answer

The observation B.[The cue ball exerts a larger force on the 8 ball than the 8 ball exerts back on the cue ball.] is not true. this is because the cue ball and 8 ball would exert equal and opposite forces on each other as per Newtons 3rd law of motion.

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