The term free body is usually associated wih the notion of a free body diagram, a pictorial device used by physicists and engineers. In that context, a body is said to be "free" when it is singled out from other bodies for the purposes of dynamic or static analysis. The object does not have to be "free" in the sense of being unforced, and it may or may not be in a state of equilibrium. The object is said to be free in the sense that it has been singled out, identified, as the body of interest.
Famous quotes containing the words free and/or body:
“What we want is not freedom but its appearances. It is for these simulacra that man has always striven. And since freedom, as has been said, is no more than a sensation, what difference is there between being free and believing ourselves free?”
—E.M. Cioran (b. 1911)
“Never did I read such tosh. As for the first two chapters we will let them pass, but the 3rd 4th 5th 6th—merely the scratching of pimples on the body of the bootboy at Claridges.”
—Virginia Woolf (1882–1941)