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Homework Help: Finding the value of a moment

  1. Feb 19, 2013 #1
    1. The problem statement, all variables and given/known data
    Find the moment generated about point O by the force, F1.

    2. Relevant equations
    Moment = Perpendicular Force * distance

    3. The attempt at a solution
    I tried plugging in that, because sqrt(3^2+4^2)=5, that my result would be either 6cos(30)*5 or 6sin(30)*5, but both of those answers are wrong
    Last edited: Feb 19, 2013
  2. jcsd
  3. Feb 19, 2013 #2


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    Homework Helper
    Gold Member
    2017 Award

    You need to find the component of the force that is perpendicular to the rod. So, you will need to find the angle between the force and the rod. It might help if you first find the angle that the force makes with respect to the horizontal direction (x direction).
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