In a game of pool, you are shooting the cue ball at the 8-ball at 20m/s. The cue ball weighs 0.17kg and the 8-ball weighs 0.16kg. Before the collision, the 8-ball is at rest. Determine the speed of cue ball after the collision if e = 0.5. In a game of pool, you are shooting the cue ball at the 8-ball at 20m/s. The cue ball weighs 0.17kg and the 8-ball weighs 0.16kg. Before the collision, the 8-ball is at rest. Determine the speed of cue ball after the collision if e = 0.5.