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Find the kinetic friction of an object at an angle

  1. Nov 30, 2015 #1
    A box weighing 87 lb is being pulled with a rope that exerts a force of 60. lb at an angle of 15 degrees with the horizontal. If the coefficient of kinetic friction is .35, what is the kinetic friction?
  2. jcsd
  3. Nov 30, 2015 #2


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    This is a homework or coursework type problem. Please post it in the appropriate Homework forum and use the Homework Template.
  4. Dec 1, 2015 #3

    you see in this case weight mg have two componets along the plane and prependicular to plane. component along the plane tries to bring weight down the slide and the other component pushes the plane. As this component push plane, plane would also push it with same force unless plain would have deprssed. This resultant gives rise to friction.
    F = mgCos(alpha)
    Rest you can calculate. Hope this one helps.

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