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Find the moment about axis AC

  1. Sep 9, 2012 #1
    1. The problem statement, all variables and given/known data
    http://session.masteringengineering.com/problemAsset/1127287/7/Probs._454_55.jpg
    Find the moment about the axis AC. F=<7,12,-6>


    2. Relevant equations
    MomentAC = Uac dotted with (Rab X F)
    Uac is the unit vector from a to c


    3. The attempt at a solution
    Uac=<.8,.6,0>
    Rab=<4,3,-2>
    F=<7,12,-6>
    Rab X F =<6,-10,0>
    MomentAC=4.8-6
    =-1.2
    MomentAC*Uac=<-.96,-.72,0>
     
  2. jcsd
  3. Sep 9, 2012 #2
    Can anyone help?
     
  4. Sep 10, 2012 #3
    Anyone?
     
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