In Figure, the incline is frictionless and the string passes through the center of mass of each block. The pulley has a moment of inertia I and a radius r.

(a) Find the net torque acting on the system (the two masses, string, and pulley) about the center of the pulley.

(b) Write an expression for the total angular momentum of the system about the center of the pulley when the masses are moving with a speed v.

(c) Find the acceleration of the masses from your results for parts (a) and (b) by setting the net torque equal to the rate of change of the angular momentum of the system.