1. The problem statement, all variables and given/known data (a) If R = 12 cm, M = 500 g, and m = 50 g (below), find the speed of the block after it has descended 50 cm starting from rest. Solve the problem using energy conservation principles. - The pulley is setup on the corner of a desk with the object hanging from it. M is the Pulley, m is the object, R is the radius of the pulley. 2. Relevant equations mg-T=ma -RT=1/2MR^2(alpha) 3. The attempt at a solution I don't know where to start on this problem. I don't know how to combine the 2 equations or relate them. The only thing I know is that if I can find alpha, I can find the tangential acceleration. That would be the same as the acceleration of the object going down, so I could use equations of motion to find out the speed. At least I think that's how it would work. please help.