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Homework Help: Kinetic Friction coefficient.

  1. Oct 10, 2007 #1
    1. The problem statement, all variables and given/known data
    Blocks 1 and 2 of masses m1 and m2, respectively, are connected by a light string. These blocks are further connected to a block of mass M by another light string that passes over a pulley of negligible mass and friction. Blocks 1 and 2 move with a constant velocity v down the inclined plane, which makes an angle [tex]\theta[/tex] with the horizontal. The kinetic frictional force on block 1 is f and that on block 2 is 2f.

    determine the coefficient of kinetic friction between the inclined plane and block 1.


    Determine the value of the suspend mass M that allows the two blocks to move with constant velocity down the plane

    2. Relevant equations
    (sum of forces) = (mass)(acceleration)
    (kinetic friction force)=(kinetic friction coefficient)(normal force)

    3. The attempt at a solution
    I set the sum of the forces equal to zero for both the vertical and the horizontal components, but I don't think they came out right.
  2. jcsd
  3. Oct 11, 2007 #2


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    Staff Emeritus
    Science Advisor

    Why don't you post what you got, and someone can check your work for you.
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