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 47
n ordinary door asa free body. Support is provided by two verti-cal hinge-pins, of smooth surfaces, whose dis-tance apart is such that the lower one alonereceives vertical pressure from the door (i.e.,furnishes a vertical supporting force, Y^, at itshorizontal upper face). The upper hinge-pin… … DOOR—WEDGE AND BLOCK. 39 hinge-pin, hy its reaction 11^, offers lateral support at that point.Given the weight G of the door (considered as concentrated inits centre of gravity) and the distances a and A, it is required todetermine the three pressures, JI, H^, and Y^.From ^2 (vert, comps.) = 0 we…
