Centripetal force is the force by which bodies are drawn from all sides, are impelled, or in any way tend, toward some point as to a center. — Isaac Newton Copy Share Image
The same thing is to be understood of all bodies, revolved in any orbits. They all endeavour to recede from the centres of their orbits, and were it not for the opposition of a contrary force which restrains them to… — Isaac Newton Copy Share Image
