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When i try to do this i end up with a fourth order polynomial

  1. Sep 16, 2016 #1
    1. The problem statement, all variables and given/known data
    The collar A slides on the vertical smooth bar. Masses ma=20 kg, mb = 10 kg, and spring constant k = 250 kN/m. When h = 0.2m, the spring is unstretched. Determine the value of h when the system is at rest. 20160916_204148.jpg

    2. Relevant equations
    sum of all forces equal zero
    sum of all moments equal zero
    f_g=mg
    can some one please show me how to do this correctly?
     
    Last edited: Sep 16, 2016
  2. jcsd
  3. Sep 16, 2016 #2

    Charles Link

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    Homework Helper

    I also get a 4th order polynomial in h. The equations are simple enough for the forces, but the clumsy geometry seems to create this complexity.
     
  4. Sep 16, 2016 #3
    Ok, thank you I will try to solve it then.
     
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