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Gravity is a force in the same way the centrifugal force is a force An artifact of rotating coordinate frames in one, the curvature of spacetime in the other
by nimish 6y ago
Gravity is a force in the same way the centrifugal force is a force
An artifact of rotating coordinate frames in one, the curvature of spacetime in the other
- tiffanyh 6y agoI think you mean centripetal force. https://www.diffen.com/difference/Centrifugal_Force_vs_Centripetal_Force https://www.diffen.com/difference/Centrifugal_Force_vs_Centr...
- nimish 6y agoNo I mean centrifugal. It's a fictitious force, an artifact of choosing a rotating non inertial coordinate frame. Gravity arises similarly, by being in a non inertial frame induced by mass energy https://en.m.wikipedia.org/wiki/Fictitious_force https://en.m.wikipedia.org/wiki/Fictitious_force This was the key insight behind Einstein attempting to get general relativity working.
- yunruse 6y agoMm, just like we have wave-particle duality, one can also speak of some sort of “force-coordinate duality”, as it were. Just as we let the sine function be linear for small angles, quasiparticles with forces in Cartesian space are wonderful abstractions. Good physics – especially applied physics – is about handling this balance between precision and mathematical/computational simplicity. Mind, research physics can be the opposite; a lot of nuclear involves (often special) relativity as combined with QM. Until we have a unifird theory, however, the graviton and its force ain’t dead yet.
- nimish 6y agoI'm unconvinced that treating spacetime as a quantum field is the right approach -- just a gut feeling -- given gravity "feels" so much different than the quantum theories and general relativity is just so beautifully geometric. I'd be very sad if we had to lose that and deal with gravitons.