Notes and examples in mechanics; with an appendix on the graphical statics of mechanism; (1897)
Church, Irving P. (Irving Porter), 1851-1931 · New York, J. Wiley & Sons · leaf 124
tle puzzling to the student because the PIER-REACTIOTTS—GRAPFIICS. 115 amounts and direction of the two auxiliary, nnitually annulling,forces P and F are not known at the outset. Ilence we here present a construction in which those twoforces are completely assumed and known at the outset. Assume1… … Fig. 126. portion of the force-polygon with the known forces 1, 2, 3, and4, beginning at <9, and the first three rays, I, II, and III (dotted).The first segment of the corresponding equilibrium polygonshould begin at a, the intersection of the action-lines of forces 1and 2. and finally the third…
