Finding velocity after collision if you know mass and height. Help!! 1. The problem statement, all variables and given/known data A 50 gram ball enters a a pendulum with mass 200 g. The pair then swings up to a height of 11 cm. find the velocity immediately after the collision? Then find initial velocity of ball before collision. 2. Relevant equations Vf= square root of 2gh. 3. The attempt at a solution Used above equation and got 14.7 which proved incorrect. Any help would be nice! Thanks!!