1. The problem statement, all variables and given/known data The pulley in Fig. 9-25 has radius 0.150 m and moment of inertia 0.440 kg·m2. The rope does not slip on the pulley rim. Use energy methods to calculate the speed of the 4.00 kg block just before it strikes the floor. Figure: http://www.webassign.net/yf9/9-25.gif 2. Relevant equations Ug = mgh Krotational = .5I 3. The attempt at a solution I tried using torques and kinematics but that didn't work. I've tried doing mgh = .5mv^2 + .5mv^2 + .5mv^2 (each m being each block and the pulley) but that didn't work either. Help please! Thank you!