Replace with equivalent force-couple system?

  1. Replace with equivalent force-couple system??

    My book has one page on this and I do not understand what they want...

    Please see attached picture for problems..

    First one, left side, says replace the 5KN force with an equivalent force-couple system at O.

    and

    The second one says to replace the 500N force with a equivalent force-couple system at B.

    Thanks a lot
     

    Attached Files:

  2. jcsd
  3. Re: Replace with equivalent force-couple system??

    I think what you want is C = rXF where r is the vector from the point in interest to the point where the force acts and F is the applied force vector.

    C = r_x*F_y - r_y*F_x

    See, "What is a couple?"

    In

    http://plus.maths.org/content/unspinning-boomerang
     
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