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Newton



http://en.wikipedia.org/wiki/File:GodfreyKneller-IsaacNewton-1689.jpg
  • Isaac Newton
  • An English scientist
  • Lived from 1642 to 1727 AD
  • Famous for his various works on the laws of motion and the universal law of gravitation
  • Built upon the previous works of Galileo and Kepler
  • The gravity law was originally published in Newton's "Philosophiae Naturalis Principia Mathematica" in 1687 5
  • Rumored that Newton was provoked to study gravity after observing an apple dropping from a tree 7


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http://gilkey63.blogspot.com/2012/03/comparison-and-contrast-of-newtons.html

The Law of Universal Gravity:

Given two masses, m1 & m2, separated by a distance r, will have a gravitational interaction or force, that varies inversely as the square of the distance r, as shown in the equation.4