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Something? Yes. Very much? No. It's used to describe the equations of motion of a generalize coordinate system with some sort of constraining force.
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Are you taking statics?
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Edited by Haydo: 12/5/2013 10:51:42 PMNo, Classical Mechanics. (Also called Analytical Mechanics)
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Eh, I've only taken mechanics and electromagnetism, afraid I can't help you.