1) A system composed of blocks, a light frictionless pulley, and connecting ropes is shown in the figure. The coefficient of friction between the both blocks and the incline is 0.12. The 9.0-kg block accelerates downward when the system is released from rest. What is the acceleration of the system and the tension in the rope connecting the 6.0-kg block and the 4.0-kg block? [Answers: 1.53 m/s, 44.7 N] 6.0 kg 30 4.0 kg 9.0 kg