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Homework Help: Interesting problem in statics

  1. Sep 24, 2007 #1
    1. The problem statement, all variables and given/known data

    There is a homogeneous rod stabilized on three fulcrum points. The separation of the fulcrums are of different distances. What forces act in the individual fulcrum points, if the mass of the rod is m? [The rod has to be stable, and hence the net force, torque = zero]

    2. Relevant equations


    3. The attempt at a solution

    still thinking
  2. jcsd
  3. Sep 24, 2007 #2


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    The three fulcrum points must apply a net force that is equal to the weight of the rod.

    Then the net moment about any of the fulcrum must also be zero.
  4. Sep 24, 2007 #3


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    How many unknowns do you have?
    How many equations do you need?
    "any" ideas?
  5. Sep 24, 2007 #4
    The only given parameters are the mass, m, and the four unequal lengths p,q,r and s. You just need to find the forces acting on the points A, B and C.
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