I'm trying to figure out what formula to get started in this question: A 7kg bowling ball moving with a velocity of 8 m/s strikes a single pin of mass 1.36kg. The impact deflects the bowling ball 10 degrees from it's original path. The pin moves along a path 45 degrees from the original path of the ball after the collision. Calculate the velocities of (a) the ball and (b) the pin just after the collision. Obviously the formula m1v1 + m2v2 = m1v1' + m2v2' can't be used since both final velocities are unknown. I know that: P1y = -P2y Pox = P1x + p2x Thanks.