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Homework Help: Dynamics question, test tommorrow

  1. Jul 9, 2009 #1
    Dynamics question, test tommorrow :(

    Hello, need some help on this one for the test. The solution is 3.9 m/s^2 in the book, im not sure what i have done wrong.

    1. The problem statement, all variables and given/known data


    2. Relevant equations

    3. The attempt at a solution

    Here is my attempt. sorry about the big X i was frustrated.

  2. jcsd
  3. Jul 9, 2009 #2
    Re: Dynamics question, test tommorrow :(

    hmmmmmmmmm, got it.

    At the very end where i have Fnet = m a

    m is actually (2.5 + 5.5)
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