A small block of mass mz hangs from massless rope wrapped around a pulley with radius Of R. The moment of inertia Of the entire pulley is_ 5m2 (R)? Another block m1=2mg is connected to the outer cylinder of the pulley via horizontal massless rope. The coefficient of kinetic friction between the block and the horizontal surface is /lk 4 (i.e the frictional force is f _ {m1g) When m2 is released from rest; what is the angular acceleration a of the block and pulley system?