A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams (1829)
Curtis, Thomas, fl. 1820 · London : Thomas Tegg · leaf 680
of contact,he proceeds to lay down the mathematical partof his system, and which depends on the follow-ing theorems:— Theor. 1, The areas which revolving bodiesdescribe, by radii drawn to an immoveable cen-tre of force, lie in the same immoveable planes,and are proportiooa to the times in which… … In the second part of that time, the same would,by law 1, if not hindered, proceed directly to calong the line Be = A B: so that by the radiiAS, BS, c S, drawn to the centre, the equalareas A SB, BSe, would be described. But,when the body is arrived at B, suppose the cen-tripetal force acts at once…
Encyclopedias and dictionaries · Aeronautics
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