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Tension with connected blocks

  1. Sep 23, 2009 #1
    1. The problem statement, all variables and given/known data
    three connected blocks are pulled to the right on a horizontal frictionless table by a force of magnitude T3 = 13.8 N. If m1 = 15.1 kg, m2 = 24.8 kg, and m3 = 30.5 kg, calculate (a) the magnitude of the system's acceleration, (b) the tension T1, and (c) the tension T2.

    (the figure has 3 blocks in this order: 1----2-----3--- being pulled by a hand on this side


    2. Relevant equations

    f=ma

    3. The attempt at a solution

    well, i got part a. that was just the sum of the masses, using t3 as the force in the f=ma equation. now, for the next part, i would think that the tension on block 2 would be the sum of block 1 and 2 (because they go in decreasing order) times the acceleration. likewise, i would think that block 1's tension would just be... the mass of block one times the acceleration. evidently that is wrong, so i'm just wondering if someone can give me a hand. thanks!


    EDIT:
    ..this was actually correct
    just, the way i was entering it was wrong
    ignore this post, sorry! :)
     
    Last edited: Sep 23, 2009
  2. jcsd
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