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Homework Help: Another static equilibrium problem.

  1. Sep 22, 2008 #1
    1. The problem statement, all variables and given/known data
    A uniform pole of mass is at rest on an incline of angle , secured by a horizontal rope as shown in the figure. For what angle does the situation require the greatest coefficient of friction?

    http://img146.imageshack.us/img146/4906/rw1257xg9.jpg [Broken]
    http://g.imageshack.us/img146/rw1257xg9.jpg/1/ [Broken]


    2. Relevant equations
    I have no idea.


    3. The attempt at a solution
    I know that the formula for friction in this case is u = sin(2theta)/(3+cos(2theta)), and that somehow I am supposed to get the answer of 54.7 degrees from that. However, I have no clue about how to get either the formula or the answer. Please help.
     
    Last edited by a moderator: May 3, 2017
  2. jcsd
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