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)
hedirection of motion is indefinitely small at B. That a finite velocity in the direction perpendicular to SBcould remain up to B, may be shewn by producing SB to Tip the tangent PY at P; then the component of the velocity at P perpendicular to SB is -^ . ^ = -^ = ^, when the body arrives at a… … sures of the force are obtained are not subtenses, or sagittse,since they are in this case not inclined at a finite angle to thetangent. 192 NEWTON. But it can be seen In another manner from tbe polygon ofProp. I, that the force is infinitely great, when the distance fromB becomes infinitely small.…
Mechanics · Celestial mechanics
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