Notes and examples in mechanics; with an appendix on the graphical statics of mechanism; (1903)
Church, Irving P. (Irving Porter), 1851-1931 · New York, J. Wiley & sons; [etc., etc.] · leaf 43
pposed to furnish allthe horizontal resistance. Hencethe system of forces acting on thewhole truss, considered free, willbe as shown in Fig. 36, in whichthere are three unknown reac-tions (or pressures, of the support-ing surfaces), Fo, Vn, and IT. Hbecomes known from :SX=0, viz., 2Trsin«By moments… … Fig. 36. /^=0. (1) (2) SIMPLE ROOr-TKUSS. 35 [Note.—HaviDg now made use of three independent equations,based on the laws of equilibrium of forces, and by their aid de-termined three quantities originally unknown, the student shouldnot imagine that by putting 2 Y = 0, or by writing anothermoment…
