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[mechanics] modeling two connected bars

  1. Apr 7, 2007 #1
    1. The problem statement, all variables and given/known data

    http://tam.cornell.edu/~als93/wb1413spring2007/assign6.pdf

    2. Relevant equations

    Lagrange equations of motion

    3. The attempt at a solution

    [​IMG]


    Where do I put the origin? I presume my instructor want something like:
    x1=L/2*sin(alpha) x2=L/2*sin(beta)
    y1=L/2*cos(alpha) y2=L/2*cos(alpha)
    phi1=alpha phi2=beta

    But where does the angle gamma pops up? And how do I connect the mass on top of the two bars?
     
  2. jcsd
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