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Torque question

  1. Mar 30, 2014 #1
    1. The problem statement, all variables and given/known data
    http://postimg.org/image/tdocieaxx/ [Broken]

    Why does the force system produce no torque about O
    don't mg and N produce a torque about O?

    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Mar 30, 2014 #2

    SammyS

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    attachment.php?attachmentid=68166&stc=1&d=1396239764.png

    How is torque about a point calculated?
     

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    Last edited by a moderator: May 6, 2017
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