Who invented gravity ?
Article Catalogue | Submit Article Newton’s Law of Universal Gravitation: Every particle in the universe attracts every other particle with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them. The direction of the force is along the line joining the particles. Two Old Problems : From at least the time of the ancient Greeks, two problems were puzzling: (1) the falling of objects released near the Earth’s surface, and (2) the motions of the planets. Although there was no reason at that time to connect these two problems, today we recognize that they result from the effect of the same force—gravitation. The earliest serious attempt to explain the motions of the planets was due to Claudius Ptolemy (A.D. 2nd century), who developed a model of the solar system in which the planets, including the Sun and Moon, revolved about the Earth. Unfortunately, to explain the complicated orbits of the planets in this geocentr
