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Net-Force Question

  1. Jun 15, 2014 #1
    1. The problem statement, all variables and given/known data

    A 20 kg crate is lifted by an upward force of 200 N. The crate's upward acceleration is:


    2. Relevant equations

    F = ma

    a = F ÷ m

    3. The attempt at a solution

    I can't for the life of me find the answer to this question (which is supposedly .2 m/s^2). I don't know how to get an answer like that, the best I can come up with is 10 m/s^2 using the formula above. Help will be appreciated, thank you.
     
  2. jcsd
  3. Jun 15, 2014 #2

    ehild

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    Gold Member

    What forces act on the crate?

    ehild
     
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