Newton's Principia, sections I, II, III, with notes and illustrations. Also a collection of problems (1863)
Newton, Isaac, Sir, 1642-1727, Frost, Percival, 1817-1898 · Cambridge, London, Macmillan and Co · leaf 277
remities are suspended at two points, would hang under the action of gravity,supposed to be a constant force acting in parallel lines. The directrix is a horizontal straight line whose depth belowthe lowest point is equal to the length of string whose weight isequal to the tension at the lowest… … T O Let A be the lowest point of a uniform and perfectly flexiblestring hanging from two points under the action of gravity, Pany other point, A 0 the length of string whose weight is equalto the tension of the string at A. Take a point B in OA, or OA produced, and let OM, BCdrawn horizontally meet…
Mechanics · Celestial mechanics
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