Chapter 9, Problem 97E

The kinetic energy of a rolling billiard ball is given by,
$\text{K}\text{.E=}\frac{\text{1}}{\text{2}}{\text{mv}}^{\text{2}}$

Suppose a 0.17-kg billiard ball is rolling down a pool table with an initial speed of 4.5 m/s. As it travels, it loses some of its energy as heat. The ball slows down to 3.8 m/s and then collides head-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 3.8 m/s. Assume the first billiard ball is the system and calculate w, q, and $\Delta \text{E}$ for the process.