A ball of mass m = 2.1 kg moving with a speed of v0 = 15.2 m/s strikes an identical ball which was initially at rest. After the collision, the incoming ball (ball 1) goes off at q1 = 28° relative to its original direction and the struck ball (ball 2) moves off at q2 = 38° as shown in the diagram. a) What is the magnitude of the initial momentum of the two ball system? Ans, Used momentum m1v1 = m2v2 , Got the answer b) What is the ratio of the balls' final speeds? Since there is no vertical momentum before the collision, the net vertical momentum must be zero after the collision. Since the vertical momentum must be zero after the collision, what does that tell us about the ratio of vertical momentum of the two balls? c) What is the final speed of the incoming ball? v1 d)What is the final speed of the struck ball? v2 Need help with b , c , and d .