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Moments, finding angle.

  1. Sep 16, 2010 #1
    Hey guys I'm having trouble with this simple statics problem.

    [PLAIN]http://img443.imageshack.us/img443/7218/37statics.png [Broken]

    [PLAIN]http://img841.imageshack.us/img841/6734/372.png [Broken]

    My set up.

    [PLAIN]http://img543.imageshack.us/img543/9349/ya1x.jpg [Broken]

    I'm confused on where I'm supposed to take it from here. The solutions are: 6.12, 33.8 degrees.

    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Sep 16, 2010 #2


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    Homework Helper

    Your final equation is 850=(11cosα)(22) + (11sinα)(8).

    Try expressing (11cosα)(22) + (11sinα)(8) as Rsin(α+θ). So expand out Rsin(α+θ) and equate coefficients. This will allow you to eventually replace '(11cosα)(22) + (11sinα)(8)' with Rsin(α+θ), leaving you with Rsin(α+θ)=850, which you can easily solve.
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