Physics, asked by haiqah7625, 1 year ago

How is newton's law of gravitation universal physics stackexchange?

Answers

Answered by vbijwe9
0
Newton actually calculated, using a lot of obscure geometry and limiting concepts, the orbits that various force forms would generate. One of those forms was the inverse square force. If you want to know what the others were, find a copy of the Principia and wade through it.

The result wasn't published until Edmund Halley asked Newton if he knew the nature of the force (our modern wording) that would cause something to have a repeating orbit. Halley was investigating the possibility that sightings of a bright comet every 76 years could possibly be the same comet. Newton immediately responded that it was an inverse square force. Halley was shocked with the quick answer. Newton had worked out the math for various forces out of curiosity and never told anyone. Halley forced him (with his financial backing) to publish the results. Halley was also impressed that the orbits from the inverse square force would mathematically produce the same results as Kepler had extracted from Tycho's planetary data.

Newton's reasoning was that the same force which gave an object weight (or gravitas, from the Latin) was the same force which kept the moon in orbit around the Earth and the Earth around the Sun, etc.

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