1. The problem statement, all variables and given/known data A 5.80 kg ball is dropped from a height of 13.5 m above one end of a uniform bar that pivots at its center. The bar has mass 8.50 kg and is 5.40 m in length. At the other end of the bar sits another 4.00 kg ball, unattached to the bar. The dropped ball sticks to the bar after the collision. How high will the other ball go after the collision? 2. Relevant equations U = mgh torque = Iα 3. The attempt at a solution I set my equation up like this m1gh1 - Iα = m2gh2 where everything is known except for h2 (what im trying to find) and α (angular acceleration). Im stuck because i have one equation with 2 unknowns, im not sure what im missing. Any help would be greatly appreciated.