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Work done in overcoming friction

  1. Jul 30, 2009 #1
    1. The problem statement, all variables and given/known data
    A force of 52 N is applied to a 12 kg mass resting on a bench where the force of sliding friction is 15 N. The work done in overcoming friction while moving the object 24 m is


    2. Relevant equations
    w=fd


    3. The attempt at a solution
    do i have to do something special with the force of friction? or do i just plug the variables for force and distance in the equation and that is the answer..
     
  2. jcsd
  3. Jul 30, 2009 #2
    Re: work

    That's a long bench! Yes, you have to account for friction. If we assume the force pulling the mass is completely in the horizontal, then it's pretty easy to find the net force (remember, the f in w = fd is the net (if you're finding total work done)!).
     
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