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Find Work

  1. Nov 13, 2012 #1
    1. The problem statement, all variables and given/known data

    force.png

    2. Relevant equations

    Work = F xcomponent * delta x

    3. The attempt at a solution
    The force is given as a resultant since it does not give a specificed x or y component. Any hints on how to do I find the x component?
     
  2. jcsd
  3. Nov 13, 2012 #2

    Doc Al

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    It states that the force points in the x direction.
     
  4. Nov 13, 2012 #3
    if thats the case the force would 33.5N , the work will be (33.5N)(16m) = 537 J which was wrong. I do not get where did I go wrong if all the information is given.
     
  5. Nov 13, 2012 #4

    haruspex

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    The force is not constant in magnitude. It increases from 0 (at x=0). You'll need to use integration.
     
  6. Nov 13, 2012 #5
    if I have to use integration on force then it will be (2(ax^(5/2))/5 .

    plugging in the value of a and x= 16m I got 214.6 J <- which is wrong. where did I go wrong?
     
  7. Nov 13, 2012 #6

    Doc Al

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    That looks OK.
    Double check that arithmetic.
     
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