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Central force fields and Kepler's laws
Published online by Cambridge University Press: 18 June 2018
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In this survey we give very simple proofs of Kepler's Laws and other facts about central force fields using only Newton's second law, Newton's law of universal gravitation, basic notions of vector calculus, and an elementary double integral.
Hopefully, this article will help undergraduate students of mathematics and engineering who wish to understand these fundamental scientific discoveries.
In many textbooks (see, for instance, [1, 2, 3, 4, 5]), Kepler's Laws are obtained using conservation of energy and angular momentum, differential equations, mobile reference systems, or notions not so well-defined such as differentials or ‘infinitesimal elements’. Some of the arguments appear to be rather involved if one is not accustomed to them, whereas the proof of Kepler's Laws may actually be obtained from quite simple facts.
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- Copyright © Mathematical Association 2018