Two-Body Pulley Problems Now we have two equations of motion: T = 3 a + 6 new equation #1 T = a equation #2 (no change) Solve by sub #1 into #2 3 a + 6 = a 4.5 a = 9 a = 2.0 m/s 2 M A = 3.0 kg M B = 1.5 kg Pulley: a machine that changes the direction of the tension force but not its size.
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