1. The problem statement, all variables and given/known data Figure 9-48 gives an overhead view of the path taken by a 0.160 kg cue ball as it bounces from a rail of a pool table. The ball's initial speed is 1.47 m/s, and the angle θ1 is 62.9°. The bounce reverses the y component of the ball's velocity but does not alter the x component. What are (a) angle θ2 and (b) the magnitude of the change in the ball's linear momentum? (The fact that the ball rolls is irrelevant to the problem.) http://edugen.wiley.com/edugen/courses/crs1650/art/qb/qu/c09/fig09_47.gif 2. Relevant equations p = mv where p and v are vectors. 3. The attempt at a solution before the moment of impact, I found the Vx and Vy of the ball traveling through the pythagorean theorem and I know that the velocity along the x axis is constant. I'm just having a hard time trying to comprehend this problem. I tried this equation: J = Pf - Pi = M (Vf-Vi) where J, P and V are vectors Jx = 0 because the Vx is equal on before and after the collision. But still found myself stuck.