Newton's principia, first book sections I, II, III, with notes and illustrations and a collection of problems, principally intended as examples of Newton's methods (1900)
y orhifwhatever, in a non-resisting medium, and if at the ex-tremity of a very small arc, commencing from any pointin the orbit, a subtense of the angle of contact at that pointhe drawn parallel to the radius from that point to thecentre of force, then the force at that point tending to thecentre… … angle of contact at P, parallel to PS. T the time ofdescribing PQ. F the accelerating effect of theforce at P.Then, when the body leaves P, it would, if not acted onby the central force, move in the direction PR, and ifthe force F continued constant in magnitude anddirection throughout the time T,…
Mechanics · Celestial mechanics
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.
