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Homework Help: Work and force

  1. Oct 16, 2008 #1
    1. The problem statement, all variables and given/known data
    A bug slides back and forth in a bowl 11cm deep, the bowl is frictionless except a 1.5cm patch at the *flat* bottom coefficient of friction = .61

    2. Relevant equations
    W = f*d
    r= 11cm

    3. The attempt at a solution
    i can get the first part (its velocity right when it hits the patch [1.47m/s] afterwards I'm stuck i tried using Work = F*d but i get:
    W = -.61(mass)(9.81) * .015m

    how am i supposed to solve this without the required mass? i tried finding substitutes to put in for mass or to remove mass, but no luck.
  2. jcsd
  3. Oct 16, 2008 #2


    User Avatar
    Science Advisor
    Homework Helper

    Hi Grogerian! :smile:

    I assume you're using the work-energy theorem …

    the mass should appear on both sides, so you can just cancel it at the end. :wink:
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