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Finding Work with friction

  1. Oct 31, 2007 #1
    1. The problem statement, all variables and given/known data

    Calculate the work done by a 0.47N force pushing a 0.026kg pencil 0.26m against a force of friction of 0.23N.

    Knowns:

    F = 0.47N
    m = 0.036kg
    d = 0.26m
    Ff = 0.23N

    2. Relevant equations

    Work = Force x Distance

    3. The attempt at a solution

    Since I know work = f*d, I do
    w = 0.47N * 0.26m
    = 0.1222J

    I'm unsure of how to add friction into the calculation.
     
  2. jcsd
  3. Oct 31, 2007 #2
    No. I am pretty sure you are correct. The force is 0.47N, and the distance is 0.26m. The friction is merely slowing the pencil down, which does not effect work.
     
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