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Homework Help: Two Angle, Leaning Stick Static Friction Problem

  1. Aug 30, 2009 #1
    State the Problem

    End A of a slender, uniform rod of weight w and length L bears on a horizontal surface ash shown, while end B is supported by a cord BC of length L. Knowing that the coefficient of static friction is 0.40, determine (a) the value of theta for which motion is impending, (b) the corresponding value of the tension in the cord.

    http://img198.imageshack.us/img198/4025/0823bookdiagram1.jpg [Broken]

    Related Equations
    F = mu * n

    Work Done So Far
    http://img243.imageshack.us/img243/4356/082310001.jpg [Broken]
    http://img198.imageshack.us/img198/1922/082310002.jpg [Broken]
    http://img42.imageshack.us/img42/558/082310003.jpg [Broken]
    http://img20.imageshack.us/img20/2554/082310004.jpg [Broken]
    http://img86.imageshack.us/img86/9180/082310005.jpg [Broken]

    I put these into the computer but it couldn't give me an answer; does this look set up okay to you?
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Aug 31, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper

    lizzyb: I can't read the illegible writing, so let me take a guess. What is that stuff under the square root sign for? What's that all about? Eliminate it, then try solving again. The solver needs to be a good one for this problem. Bad solvers, or good solvers on bad machines, can have trouble with this problem.
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