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Homework Help: Force Couple

  1. Jan 26, 2012 #1
    1. The problem statement, all variables and given/known data

    The forces shown in the Figure below form a couple. Replace the couple shown with an equivalent couple acting at points A and B. Please see figure

    2. Relevant equations

    Couple force moment equation is M = Fd (take only one of the two force vectors and distance between them)

    3. The attempt at a solution

    Actually, I don't understand what they want. I was just going to do M = 15 lb x(12in) but this question is for 6 marks so i'm definitely missing something. Please advice if you know what this question means.

    Thank you,
    Faisal Shibli

    Attached Files:

  2. jcsd
  3. Jan 26, 2012 #2


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    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi Faisal! Welcome to PF! :smile:
    The 6 marks do seem strange. :confused:

    The question seems to be asking for a pair of opposite parallel forces through A and B …

    which could be at any angle …

    with the same Fd.
  4. Feb 5, 2012 #3
    Looks to me like a badly worded and badly drawn question. My response was to have a couple at A and B with forces perpendicular to AB. I wonder if I would have passed.
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