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Homework Help: Net force on wedge and block

  1. Sep 20, 2015 #1
    1. The problem statement, all variables and given/known data

    For the situation shown in the diagram, the block of mass m remains in place on the sloping front of the accelerating wedge, even though that sloping front is frictionless. Given these values, M = 20.0 kg, m = 4.00 kg, and theta= 34.0, calculate the net force acting on the wedge plus block (M+m) system.

    Force problem.png

    2. Relevant equations
    Newton's second law of motion

    3. The attempt at a solution
    At first, I tried turning the frame of reference so my normal force for the block was on the y axis on my free body diagram. However, when I was looking at it more, I was confused on what I was actually trying to find with the wedge.
  2. jcsd
  3. Sep 20, 2015 #2


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    Science Advisor
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    A vague description of an attempted method does not qualify as a posted attempt. We need to see your working.
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