This was a mistake, as Hooke pointed out according to Hooke’s theory of planetary motion, the path should be elliptical, so that if Earth were split and separated to allow the body to fall, it would rise again to its original location. He sketched the path of fall as part of a spiral ending at the centre of Earth. Newton bluntly refused to correspond but, nevertheless, went on to mention an experiment to demonstrate the rotation of Earth: let a body be dropped from a tower because the tangential velocity at the top of the tower is greater than that at the foot, the body should fall slightly to the east. Hooke mentioned his analysis of planetary motion-in effect, the continuous diversion of a rectilinear motion by a central attraction. But late in 1679, not long after he had embraced the concept, another application was suggested in a letter from Hooke, who was seeking to renew correspondence. Newton originally applied the idea of attractions and repulsions solely to the range of terrestrial phenomena mentioned in the preceding paragraph. Isaac Newton: The Mathematical Principles of Natural Philosophy SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find. ![]() Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives. ![]()
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