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Homework Help: Coefficient of Kinetic Friction Question

  1. Mar 29, 2009 #1
    1. If the acceleration of a pair of boxes has a magnitude of 2.5m/s^2, determine the smallest coefficient of friction between the boxes that will prevent slippage.

    2. Relevant equations
    F = ma
    Fk = ukFn
    Fw = mg

    3. The attempt at a solution

    ma = uk mg(Fn)
    a = uk g
    a/g = uk
    2.5m/s^2 / 9.8m/s^2 = uk
    uk = 0.25
  2. jcsd
  3. Mar 29, 2009 #2


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    Homework Helper

    Since you don't want it to slip, it's really the coefficient of static friction you are interested in, but as to your solution, that looks like the right method.
  4. Mar 29, 2009 #3
    oh okay, so its the same format just static friction?
  5. Mar 29, 2009 #4


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    Homework Helper


    μs not μk

    No big deal.
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