ity of a pyramid on atriangular base. Let ABC he the base of the pyramid, and Fits vertex. Take D the middle point ofone of the sides BG, and join AB,VB, in which take E and S suchthat AE = iAB and FJ3=|FP,(and HE is therefore parallel toA V); then E, H are the centres ofgravity of the triangles… … 90 OF THE CENTEE OF GKAVITY. number of thin triangular plates all parallel and similar toABO, and let abc be any one of these; if VB meet be in d, and VS meet ad in g, we have bysimilar triangles, ag : AE= Vg : VE=gd : ED; .. ag : gd=AE : EJ) = 2 : 1. Hence since d is the middle point of be, g is…
Mechanics
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