What is the relationship between couples and moments in physics?

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SUMMARY

A couple in physics refers to a system of two equal and opposite forces that are parallel, resulting in a rotational effect without translating the object. The discussion highlights the misconception that unequal forces can form a couple; specifically, a 2N and a 3N force do not constitute a couple. The relationship between couples and moments is established, as couples create a moment about a pivot point, which is crucial for understanding rotational dynamics.

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weedannycool
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Can anybody tell me what a couple is. From what i gather it is when two forces are equal, opposite and parallel.

But but if 1 force is bigger than the other say a 2 and a 3N force could it be said that there is a couple of 2N forces ?

Does it have anything to do with moments?
__________

Daniel
 
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Draw yourself a force diagram showing what you have just described, with unequal forces.

Now resolve horizontally and vertically.

Does your diagram describe equilibrium?

Does that answer your question?
 


so i suppose it depends on the angle? but don't they have to be strictly parallel?
 

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