일반물리학 1 — Force and Motion-II: Problem 29

29 In Fig. 6-35, block A of mass 2.0 kg, block B of 3.0 kg, and block C of 6.0 kg are connected by strings of negligible mass that run over pulleys of negligible mass and friction. The coefficient of kinetic friction between block B and the table top is 0.40. When the system is released, the blocks move. What is the magnitude of their acceleration?