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)
ne drawn perpendicular tothe tangent at P from the point of intersection of the axis anddirectrix. SECTION 11. CENTRIPETAL FORCES. PEOP. I. THEOEEM I. When a body revolves in an orbit, subject to the action offorces tending to a fixed point, the areas which it de-scribes by radii draivn to the… … AB with uniform velocity, being acted on by noforce. In the second interval it would, if no forceacted, proceed to c in AB produced, describing Beequal to AB; so that the equal areas ASB, BSc de-scribed by radii AS, BS, ciS drawn to the centre >^,would be completed in equal intervals. But, when…
Mechanics · Celestial mechanics
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