Newton's second law of motion. T, = m,a, (1) T-m,g = m (a –a) m,g -T = m, (a+a,) (3) For movable pulley: T, – 27 = 0(a,) (4) Solve the four equations provided STEP BY STEP to get: 4mm, + m, (m - т.) g 4m,m, + m, (т, + m,)* a :
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