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Difficult Free Body Diagrams

  1. Sep 14, 2009 #1
    1. The problem statement, all variables and given/known data
    Here is pictures of some of the mechanisms I draw the free body diagrams for
    vcvcv.jpg


    2. Relevant equations
    [tex]E[/tex]F= 0
    [tex]E[/tex]M= 0


    3. The attempt at a solution
    I am not sure how to even begin on the first problem other than drawing the force from the hand of 400 N.
     
  2. jcsd
  3. Sep 14, 2009 #2

    nvn

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    Hi, megr_ftw. Read your text book, and study the example problems, and this will show you how to get started. You must show your work; and then someone might check your math.
     
  4. Sep 14, 2009 #3
    my book isn't very good with example such as the ones above. I just need help getting started, im not asking anyone to solve all 3 of them, just some advice.
     
  5. Sep 14, 2009 #4

    nvn

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    Hint: Draw member ABC. Then draw reaction forces acting on member ABC in the x and y directions at the supports (points A and B).
     
  6. Sep 14, 2009 #5
    draw nothing for C or D?
     
  7. Sep 14, 2009 #6

    nvn

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    Draw nothing for D. Draw the 400 N force at C.
     
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