(adsbygoogle = window.adsbygoogle || []).push({}); 1.we know that generally, every force systems can be replaced by a resultant force(R) and a couple(M) at a point O. the position of point O is optional.

but magnitude and direction of M is dependent to this point while magnitude and direction of R is independent.

In static equilibrium R and M are zero at an optional point O. now this is the question:

2.While M is zero at an optional point O, why should we conclude that M would be zero at every point chosen( infinite in number of points)...pay attention that " magnitude and direction of M is dependent to the point chosen"....

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# Homework Help: Static Equilibrium

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