In a game of billiards, the cue ball is traveling eastward when it strikes a second ball that is initially at rest. After the collision, the cue ball moves at 4.79 m/s, 25 degress south of east, and the second ball's speed is 3.07 m/s. At what angle (north of east) does the second ball travel? Assume each ball has a mass of 162 g.
What was the speed of the cue ball prior to the collision?
Is the kinetic energy of the colliding balls conserved, yes or no? (Ignore the rotation of the balls.)