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Homework Help: A block with mass on a wedge with mass.

  1. Sep 22, 2012 #1
    1. The problem statement, all variables and given/known data
    The surfaces between a 9 kg block, the 15 kg
    wedge and between the 15 kg wedge and the
    horizontal plane are smooth (without friction).
    The acceleration of gravity is 9.8 m/s.

    A block is released on the inclined plane
    (top side of the wedge).

    What is the force F which must be exerted
    on the 15 kg block in order that the 9 kg block
    does not move up or down the plane?
    Answer in units of N

    2. Relevant equations

    ƩF = ma

    3. The attempt at a solution

    I know that when you push something with an object on it with a force in a direction, the object will try to oppose that direction. I don't really know how to break it into vectors though.
  2. jcsd
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