The drop of the Apple raises the question on the mind of Newton. The force of the world that makes the apple drop is the same force that "pulls" the moon to another, and it does not cause the Earth's orbit is elliptical. Calculation results confirm this idea, but it is not clear until the correspondence between Newton and Robert Hooke that caused Newton confident and confirmed the mechanics of the movement has grown in years. That same Edmund Halley visited Newton to discuss the question of the planet. Halley amazed at Newton said the force acting between the sun and the planets that orbit the ellipse is. According to the rules are two of Newton has already proven itself. Which Newton sent a document on this subject to a later viewing and Halley Halley was soliciting the Newton wrote this book. And after the hostilities between Newton and Hook contender for a long time about the claim to be the "discovery rule squared" of attraction. The book "Mathematical Principles of Natural Philosophy" was published in the book. Described universal gravitation And to lay the foundations of classical mechanics. (Classical mechanics), through the law of motion. In addition, Newton started with Newton's famous Historic Scotland South African Wilhelm Leibniz as a developer of Calculus as well.
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