1. The problem statement, all variables and given/known data http://imageshack.us/photo/my-images/545/rotacion1.jpg/ Translation: Determinate, for the system of Fig. 10-39 the angular velocity of the disk and the linear velocity of m and m'. Calculate the tension in each string. Suposse that m = 600 g, m' = 500 g, M = 800 g, R = 8 cm and r = 6 cm. 2. Relevant equations 3. The attempt at a solution The problem is I don't know to get the moment of inertia because I have the mass of one disk only.