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Homework Help: Scalar product using right hand rule ?

  1. Sep 17, 2015 #1
    1. The problem statement, all variables and given/known data
    Refer to solution II , the author used the scalar analysis( dot product) to get the direction of moment ...IMO , this is incorrect ... Only cross product can be determined this way . correct me if i'm wrong .

    2. Relevant equations


    3. The attempt at a solution
     

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  2. jcsd
  3. Sep 18, 2015 #2
    No, the solution is correct. The value of a coupled moment is just equal to the magnitude of one of the forces times the perpendicular distance between them.
     
  4. Sep 18, 2015 #3
    how can the direction of moment(scalar analysis) determined using the right hand grip rule ?
     
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