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Fricition: Block on inclined plane

  1. Dec 7, 2009 #1
    1. The problem statement, all variables and given/known data
    What is the maximum angle (theta) for which the block of mass m in (figure) will not slide down the incline if the coefficient of static friction is 0.30 and ||P|| = 0?

    Figure:

    EB2.png

    2. Relevant equations

    I know this isn't a hard problem, but I just seem to be stuck on it.

    3. The attempt at a solution

    I started by replacing the force "P" with it's X and Y components, then adding the 2 forces to the block, "mg" and "N", the normal force.

    After that I'm stumped. I'd appreciate if anyone can help me.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Dec 8, 2009 #2

    tiny-tim

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    Welcome to PF!

    Hi yellowsnow! Welcome to PF! :smile:
    (do you really mean ||P|| = 0 ?)

    It's a lot easier if you replace g, by its slope and normal components :wink:
     
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