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Coefficient of kinetic friction on inclined plane

  1. Oct 20, 2014 #1
    Why would the coefficient of kinetic friction be larger for an inclined plane versus a horizontal plane?
    Would it be related to the material? I thought initially it was something to do with the force of gravity… but apparently that's not it :(
    Thanks so much in advance!
  2. jcsd
  3. Oct 20, 2014 #2
    Hi Melanie.H. Welcome to Physics Forums.

    It's not.

    Yes. It is related to the two materials that are in sliding contact.
    No. That's right.

  4. Oct 20, 2014 #3
    Thanks! :D I was just wondering because for an experiment I actually got that it was bigger for the inclined plane….
  5. Oct 20, 2014 #4
    In the real world, the coefficient of kinetic friction also depends on the relative velocity between the sliding surfaces.

  6. Oct 20, 2014 #5
    Hm, interesting! That would also contribute to some of the limits of how large the coefficient can be then?
  7. Oct 20, 2014 #6
    I don't think so. That depends on the materials that are in contact.

  8. Oct 20, 2014 #7
    Okay, that makes sense :)
  9. Oct 20, 2014 #8
    Oh, I suppose I should have mentioned for my original question that the block was being pulled up or across the plane at a constant velocity… would this change anything?
  10. Oct 20, 2014 #9
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