# Homework Help: Force Couple

1. Jan 26, 2012

### mehsham

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

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2. Jan 26, 2012

### tiny-tim

Welcome to PF!

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

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.

3. Feb 5, 2012

### pongo38

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.