1. The problem statement, all variables and given/known data 2. Relevant equations See below 3. The attempt at a solution Ok, I have been working on this problem for almost 2 hours now and I just can't see where I'm going wrong. I tried it twice and got the same answer both times, so clearly I'm doing something wrong here, but I can't figure out what. I set up my work-energy equation for the system as a whole. Then, I solved for my forces in the y-direction and my torque force from the string. By converting the angular acceleration into radial, I substituted one equation into the other to solve for the force of my string. Then, I plugged that value into my work-energy equation, but it is coming out wrong. I am getting a CM velocity of about 2.5m/s, while the book says it is supposed to be 0.49m/s. Can someone please tell me what I am doing wrong here?