[SOLVED] Acceleration of Block on an Apparatus 1. The problem statement, all variables and given/known data See the attachment. 2. Relevant equations 3. The attempt at a solution I am confused about whether the tensions of the two (left and right) parts of the line are the same or not. Since the three blocks are accelerating so it's not a equilibrium situation. Are the tensions the same on either line? If block m3 were not there, and instead, m1 and m2 were connected I can use the equations below to solve for acceleration. But I am a bit thrown off by the addition of m3. (1) m1*g-T = m1*a (2) T-m2*g = m2*a Where T is the tension of the either line. But how do with m3, the block on the table? PS: HallsofIvy, ShootingStar, I appreciate your help with the previous problem.