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Moment diagram

  1. Jul 12, 2016 #1
    1. The problem statement, all variables and given/known data
    for the moment diagram, why the 400Nm straight line is drawn from the point of moment to a only?
    cnkrDOP.png
    OHYU4Dr.png
    2. Relevant equations


    3. The attempt at a solution
    Is it wrong? I think it should be drawn throughout the entire length of beam? since moment can act at anywhere on the beam...
     
  2. jcsd
  3. Jul 12, 2016 #2
    or the moment 400Nm will only causes the region from A to 2m away from A to break ? So , in the moment area diagram , it's drawn from A and 2m away from A ?
     
  4. Jul 14, 2016 #3
    https://www.physicsforums.com/threads/direction-of-moment.878803/#post-5520313

    In the previous thread , i was told that to keep the beam in equilibrium, the moment has to be applied at the another end (wall)in opposite direction
    But, in this question, i have 2 ends, namely A and B, but both point doesnt restrict moment, am i right?
    In the previous therad, it's wall, so it can restrict moment...But , how about this case?@SteamKing
     
  5. Jul 15, 2016 #4
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