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Homework Help: Two Forces, Two Blocks

  1. Sep 11, 2008 #1
    forces act on blocks A and B, which are connected by a string. Force FA = (15 N) i acts on block A, with mass 5.0 kg. Force FB = (24 N) i acts on block B, with mass 6.0 kg. What is the tension in the string?

    Fa Fb
    -> ->
    [A]----->

    F=ma
    (15N+24N)=(5.0kg+6.0kg)(a)
    39=11a
    3.54=a

    F=ma
    F=5(3.54)
    F=17.7 X wrong
    what am i doing wrong?
     
  2. jcsd
  3. Sep 11, 2008 #2
    Why would there be a difference in acceleration between the two blocks? If that were the case the string would either have slack or break.
     
  4. Sep 11, 2008 #3

    alphysicist

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    Homework Helper



    You found that F=17.7, but what does F in this equation stand for?
     
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