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Homework Help: Statics question

  1. Aug 12, 2010 #1
    [PLAIN]http://img38.imageshack.us/img38/6997/forces99.jpg [Broken]

    I'm unsure how to go about solving this. There's 4 unknowns. Ax Ay Cx and Cy but isn't there only 2 equations (sum of forces in x and y direction are equal to 0) that can be created in this situation?
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Aug 12, 2010 #2


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    The net moment on each strut should be 0 as well.
  4. Aug 12, 2010 #3


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    No, there are two unknowns, the forces A and C at the supports. There are two equations. Every one of your "unknowns" must be written in terms of A and C (i.e. their projections onto the x and y-axis).
  5. Aug 15, 2010 #4
    I am also stuck on this question. any hints would be much appreciated :)
  6. Sep 7, 2010 #5
    Draw the triangle of forces for joint B
  7. Sep 8, 2010 #6
    You have two additional equations. One relates Ax and Ay. The other relates Cx and Cy. Can you sketch in the expected directions of the reactions?
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