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Homework Help: System of equations

  1. Nov 17, 2008 #1
    1. The problem statement, all variables and given/known data
    I have 6 equations with six unknown variables. Does anyone know the best way to proceed?
    I've tried to substitute but it won't work for me.

    2. Relevant equations
    These are the forces in a bent rod supported at points A,B and C by journal bearings.
    equation 1 is[tex]\Sigma[/tex]Fx=0
    2 is [tex]\Sigma[/tex]Fy=0,etc.
    I don't need help with the statics, just with the solving for the unknown variables when so many are involved.
  2. jcsd
  3. Nov 17, 2008 #2
    Matrix equation. But even then, you're going to solve a 6x6 matrix. You make an equation of the form AX=B where B=0 (null matrix) in this case. X contains all your variables (x,y,z, etc) and A contains their coefficients.
  4. Nov 17, 2008 #3


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    Science Advisor
    Homework Helper

    Hi yoleven! :smile:
    You can simplify it a lot by starting with the easy one, #5, and then doing #1 and #3.

    Start it that way, and see what you get. :smile:
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