Martin, Louis Adolphe, 1880- · New York, J.Wiley & Sons, Inc.: [etc. etc.] · leaf 137
of action of the resultant. The polygon is said to beopen because all of its vertices do not lie on the linesof action of the given forces. If, however, the lines ofaction of ao and oe should coincide, then the funicularpolygon would be closed, i.e., have each of its ver-tices upon one of the lines… … Fig. 147It is, however, possible that the magnitude polygon beclosed, and that the first and last sides of the funicular FORCES ACTING ON A RIGID BODY 119 polygon do not coincide but are parallel. Under theseconditions the funicular polygon is open and a couple,whose forces are ao and oe, results.…
Mechanics
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