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:
“It has come to this, that the friends of liberty, the friends of the slave, have shuddered when they have understood that his fate was left to the legal tribunals of the country to be decided. Free men have no faith that justice will be awarded in such a case.”
—Henry David Thoreau (1817–1862)
“The body dies; the body’s beauty lives.
So evenings die, in their green going,
A wave, interminably flowing.”
—Wallace Stevens (1879–1955)