The kinetic energy of a rolling billiard ball is given by . Suppose a 0.17- billiard ball is rolling down a pool table with an initial speed of 4.7 . As it travels, it loses some of its energy as heat. The ball slows down to 3.7 and then collides straight-on with a second billiard ball of equal mass. The first billiard ball completely stops and the second one rolls away with a velocity of 3.7 . Assume the first billiard ball is the system