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 139
Q and P, prove that R is theintersection of the chord PQ with the consecutive chord PQ. SECTION II.Centripetal Forces. PROP. I. THEOREM I. When a body revolves in an orbit, subject to the action offorces tending to a fixed point, the areas, which it describes l>y radii drawn to the fixed center… … uniform velocity, being acted on by no force. In thesecond interval it would, if no force acted, proceed toc in AB produced, describing Be equal to AB: so thatthe equal areas A SB, BSc described by radii AS, BS,cS drawn to the center S, would be completed in equalintervals. PROP. I. THEOREM I. 121…
Mechanics · Celestial mechanics
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