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Dipping plane and friction

  1. Mar 11, 2013 #1
    1. The problem statement, all variables and given/known data
    Find the minimum μ required between wedge M and ground so that it stays static.


    2. Relevant equations

    I already found the equations for accelerations and tension (when μ is big).
    Do I need them?

    3. The attempt at a solution
    I would like to know whether I found all the forces acting on the wedge. (see attachment)
    Which component should I use for the green arrow force?
    NB the red forces act on the wedge
     

    Attached Files:

    Last edited: Mar 11, 2013
  2. jcsd
  3. Mar 11, 2013 #2

    haruspex

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    Is the wedge massless? Is there friction between the wedge and M1?
     
  4. Mar 11, 2013 #3
    no, wedge has mas M, and its surface it's smooth.
     
  5. Mar 12, 2013 #4

    haruspex

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    F1 and F2 are the tension, yes?
     
  6. Mar 12, 2013 #5
    I think so.
     
  7. Mar 12, 2013 #6

    haruspex

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    Go through the usual free body analysis on the two blocks (assuming the wedge is stationary) to find the acceleration and the tension. Then figure out the forces the tension applies to the wedge.
     
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