How did newton discover the law of universal gravitation?

See Answers (2)

Accepted Answer

He turned off his smartphone, his TV, his mp3 player, and his Gameboy. He told his housekeeper that he didn't want to be disturbed, and then hewent into his room.  He sat down with an ink pen and his notebook, andhe started thinking.  He thought and thought and thought, about all thethings he had seen, and all the things he had read in books, and in lettersfrom his friends who were thinking about the same things that he was.He wrote down a lot of ideas.  Some of them didn't work out when he thought about them some more, and others looked better.  After a long while of thinking, he had formulas that he thought might be the answer.  But before he could tell everyone else about them, he had to test them, to see if they would actually work.  He decided to test his formulasof gravity with the motion of the planets around the sun.  There was a lot ofexcellent data on exactly how the planets move, and a fellow named Kepler had worked with that data and come up with 3 laws that describe the motions,although nobody knew why.  Newton decided to apply his gravity formula toall of that work, and see what happens.As soon as he started, he knew he was in trouble ... there wasn't enoughMath to do what he needed to do.  So he invented more Math ... the kindthat we call "Calculus" now.  Then he was able to go all the way.  He tookhis formula for gravity, and he tested it to see what would a small body doif it was speeding around a big body, and they were both behaving like hisgravity formula.When he was finished, he found that WITH his gravity idea, a planet thattraveled around the sun would have to do EXACTLY what Kepler said they actually do from just watching them.   That's how Newton knew that his gravity formula was correct, and that hecould go and tell other people about it.The whole thing happened on account of the two tricks that he used:#1).  He was born with a good brain.#2).  He cleared away all the distractions while he was doing his homework.

Suggested Answer

Answer:The Law of Universal Gravitation was discovered by  Newton   .

Explanation: