Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 149
e faces, and must, therefore, be at their common point of intersection. Let G and G be the cen-tres of gravity of the triangu-lar faces ABB and B G B ;join these points with theopposite vertices by the rightlines A G and 0 G\ their point of intersection G, will be the centre of gravityof the… … GG GG A G : AG; where situated. The commoncentre of gravityof four equalballfl. but G G is one third of A G, and hence G G is onethird of A G, or one fourth of A G. The centre ofgravity of a triangular pyramid is, therefore, on a line join-ing one of the angles with the centre of gravity of the…
Mechanics · Acoustics · Optics
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