6) A mass of 5 kg is resting on a frictionless ramp, It is connected 7) to a cable that passes over'a pulley of radius 2 cm which is then attached to a second hanging mass. The system is moving at a constant velocity. (a) Calculate the mass of the hanging block. (b) If the blocks move 1.5 m in 3 seconds what is the angular velocity of the pulley? A mass of 8 kg is resting on a horizontal table with a coefficient of kinetic friction of 0.35. The mass ' is connected to a cable that passes over a pulley of mass 35 kg and radius 21 cm. The other end of the cable is attached to a second hanging mass of 15 kg. The system is released from rest. (a) Calculate the acceleration of the system. (b) How many times does the pulley rotate in 2 seconds