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Isaac Newton was an English physicist, theologian, inventor, alchemist, and mathematician who established the law of universal gravitation.

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Newton in this law described the gravitational interaction between different bodies with mass, where the attraction experienced by two bodies endowed with mass is directly proportional to the product of their masses and inversely proportional to the square of the distance that separates them.

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Isaac Newton's book " Philosophiae Naturalis Principia Mathematica" was published on July 5, 1687.

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This law occurred to Newton when an apple fell on his head and that was when he questioned why that had happened.

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After it was questioned, I seek to solve this question and it was based on the works of two pioneers; Bullialdus and Borelli, where he was more inspired by Borelli, thus resulting in the law of universal gravitation.

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Bullialdus suggested, without proof, that a force existed from the Sun and was proportional to the square of the distance.

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Borelli4 suggested, also without proof, that there was a centrifugal tendency in the motion of the planets that was being counteracted by another force directed towards the Sun.

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Newton concluded that:

There is a relationship proportional to the force with which two objects with mass are attracted.

The force that attracts these two objects must be proportional to the product of their mass divided by the distance between them squared.

Approximately all the most of each one of the bodies is concentrated only in its center of gravity.

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The Universal Law of Gravitation - Part 1 | Physics | Don't Memorise

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Universal Law of Gravitation - Part 2 | Physics | Don't Memorise