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Please help with a friction problem! (due tomorrow)

  1. Mar 11, 2010 #1
    Determine the coefficient of friction between a 22kg chair and the floor if it requires 15J to push it 1.8m (We're doing a Kinetic and Potential energy unit)

    Answer for mu is .04, but can you help me in getting there, we have a test tomorrow!


    Thanks in advance!
     
  2. jcsd
  3. Mar 11, 2010 #2
    This is not were you post homework questions. To answer your problem though.

    F = ukN
    uk = F / MG
    W = D * F
    F = W / D
    uk = W / MGD
    uk = (15) / (22)(9.8)(1.8)
    uk = 0.46
     
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