Imagine two billiard balls on a pool table. ball a has a mass of 2 kilograms and ball
b has a mass of 3 kilograms. the initial velocity of ball a is 9 meters per second to
the right, and the initial velocity of the ball b is 6 meters per second to the left. the
final velocity of ball a is 9 meters per second to the left, while the final velocity of
ball b is 6 meters per second to the right.

1. explain what happens to each ball after the collision. why do you think this
occurs? which of newton’s laws does this represent?