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Finding the coefficient of friction

  1. Mar 1, 2013 #1
    What is the coefficient of friction between a 65-kilogram chair and a floor if the chair can be pushed at constant speed with a force of 220 newtons?

    My attempt:
    Given:
    m=65 kg Ffr (force of friction)=220 N
    w=mg=(65)(9.8)=637 Fn=637 N
    μ=?
    μ=Ffr/Fn
    μ=220/637
    μ≈0.345

    Is this right? I honestly don't know what I'm doing so if anyone can help me it would be much appreciated. Thanks!
    1. The problem statement, all variables and given/known data



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    3. The attempt at a solution
     
  2. jcsd
  3. Mar 1, 2013 #2
    Everything is correct. Why are you saying you don't know what you are doing?
     
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