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Homework Help: Sliding mass on sliding incline

  1. Mar 9, 2010 #1
    1. The problem statement, all variables and given/known data

    A block of mass m slides down the incline of a triangular block of mass M. The angle of inclination is [tex]\theta[/tex]. The trianguilar block is free to slide on a horizontal plane. Assume that all surfaces are frictionless. What is the acceleration of the mass M?

    2. Relevant equations


    3. The attempt at a solution

    so basically i want to ask if my answer is correct, as i'm not familiar with this type of problem, i got:

    F(horizontal) = mg cos [tex]\theta[/tex] sin [tex]\theta[/tex]
    a(M, horizontal) = F(horizontal) / (m + M)

    is this right?
    Last edited: Mar 9, 2010
  2. jcsd
  3. Mar 9, 2010 #2


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    Not quite. Are the accelerations of the 2 blocks the same? What about the direction of the accelerations?
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