Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 111
thecurvilinear path. This tangent will determine the direc-tion of the bodys motion at the instant, and may bedrawn by laying off from the projections A and A ofthe bodys place, the distances A T and A I1, equalrespectively to double, triple, quadruple, or any numberof times the bodys relative… … § 105.—When the law of a bodys motion in two direc-tions is known, it is always possible by the precedingmethod to draw a tangent to the path described. Take,for example, the ellipse :this curve is generatedby fixing at two pointsF and F, called thefoci, the ends of athread FA F, equal inlength to…
Mechanics · Acoustics · Optics
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