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Can you check my solution for this trusses problem

  1. Dec 3, 2014 #1
    9ajePsI.png

    < Mentor Note -- thread moved to HH from the technical physics forums, so no HH Template is shown >

    I didn't attend the lecture in which the professor explained trusses so I don't really know.
    Am I doing something wrong so far? is the force DE 0? because if go at the point C and calculate CD (750) then go for point D CD + 400 + DE (0) = 0 don't add up
     
    Last edited by a moderator: Dec 4, 2014
  2. jcsd
  3. Dec 4, 2014 #2
    Look at your moment around B again, you are missing something.

    *hint: See the force of 600N at point C
     
  4. Dec 4, 2014 #3
    But isn't the 600 N * 0 (perpendicular distance) = 0?
     
  5. Dec 4, 2014 #4
    No, you are taking a moment around Point B. However there is a force at Point C that you didn't take into account. Force there is 600N, and the distance is 4 meters.
     
  6. Dec 4, 2014 #5
    oh my bad, the moment in this case is anti clock wise right?
    but is it counted if I take the moment at A ?
     
  7. Dec 4, 2014 #6
    Yep it is anti-clock wise. No, it is not counted if you take the moment around point A.
     
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