1. The problem statement, all variables and given/known data A 75 kg , 34 cm long rod hangs vertically on a frictionless , horizontal axle passing through its cener. A 15 g ball of clay traelling horizontally at 2.2m/s hits and sticks to the very bottom tip of the rod. To what maximum angle , measured from vertical , does the rod ( with the attached ball of clay ) rotate ? 2. Relevant equations KE= 1/2 (m+M)V^2 , U= Mg(L-Lcosθ) , mvi=(m+M)(L/2-L/2cos) 3. The attempt at a solution Energy is conserved , Ei=Ef. Ei= 1/2(m+M)v^2 , Ef = Mg(L-Lcosθ) +(m+M)(L/2-L/2cos) or should i consider K rot as well ?