1. The problem statement, all variables and given/known data A circular turntable of mass 2.0 kg and radius 6.0 inches is rotating freely at 66 2/3 rpm. If a 500 gram blob of clay is dropped on the disk at a distance of 4.0 inches from the center, what is the resulting angular speed of the system? Treat the clay as a point mass (I = MR^2) and the turntable as a disk. 2. Relevant equations 3. The attempt at a solution I understand the resulting angular speed will be the sum of the two. But what does moment of inertia have to do with it??