Saturday, 25 April 2020

newtonian mechanics - Proof that the Earth rotates?


What is the proof, without leaving the Earth, and involving only basic physics, that the earth rotates around its axis?


By basic physics I mean the physics that the early physicists must've used to deduce that it rotates, not relativity.



Answer



Foucault pendulum. I don't know how the ancients did it, but it is surely pure classical mechanics.


enter image description here


The animation describes the motion of a Foucault Pendulum at a latitude of 30°N.



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