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Shear force and moment

  1. Jul 4, 2016 #1
    1. The problem statement, all variables and given/known data
    in the book , i was told that when the shear force is 0 , moment is maximum . However , in this question , i found that when the shear foce is 0 , the moment is also 0 . I'm wondering is the ststemnet true ? swF2bVW.jpg

    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Jul 4, 2016 #2

    SteamKing

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    Obviously, if the beam is a cantilever, the shear force and the bending moment can both be zero at the free end. You won't find the maximum moment there in any event.

    I think what the author was trying to say was that since the derivative of the bending moment, dM/dx = V, the locations where the shear is zero are also possible locations where the bending moment has a relative maximum or minimum.
     
  4. Jul 4, 2016 #3
    so , for the above case , shear force = 0 , moment = 0(minimum) ?
     
  5. Jul 4, 2016 #4

    SteamKing

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    Obviously.
     
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