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Why is absolute time considered an axiom of Newtonian mechanics? What statements are based on this axiom?

I guess absolute time is associated to classical mechanics because people like Newton believed in that concept, but are there actually any statements whose derivation is based on this assumption? I've ...
Filippo's user avatar
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Is time an invariant of Galilean transformation?

Is time an invariant of Galilean transformation? By saying that I mean if there is a quantity analogous to spacetime interval in Lorentz transformation. What is the geometry of "Galilean spacetime"?
A. J. Bałaziński's user avatar