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Statics Tension, Spring, and, DownWard Force

  1. Feb 18, 2016 #1
    1. The problem statement, all variables and given/known data

    upload_2016-2-18_18-36-35.png
    2. Relevant equations
    I am Stuck getting Theta out of the last step of equation. I have found that theta is 35 by trial and error.( i wrote an excel program)



    3. The attempt at a solution
    upload_2016-2-18_18-48-54.png
     
  2. jcsd
  3. Feb 19, 2016 #2
    My final equation is similar to yours, but not exactly the same:

    $$\frac{P}{k}=\tan{\theta}\frac{(4-\cos{\theta})[\sqrt{5-4\cos{\theta}}-1]}{\sqrt{5-4\cos{\theta}}}$$

    I didn't check my algebra, so I'm not sure of this.
     
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