question to physicist followers: is the force of gravity independent of conservation of mass? i.e. could we have a universe without gravitational force but otherwise velocity & mass would work the way we'd come to expect?
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Replying to @paniq
I am a Physicist. In Newtonian Gravity, mass and energy is Conservated. In GR, Energy is not conservated* * This gets a little complicated and depends on what you mean by "energy" and "conserved".
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Replying to @TheGingerBill
stuff like: it takes more energy to accellerate heavy things. if you had a universe like that, but gravity was missing, would that be contradictive?
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Replying to @paniq @TheGingerBill
I think you're asking whether one could have a universe with inertial mass but where gravitational mass was always zero (see https://en.wikipedia.org/wiki/Mass#Definitions …). If so, then I would argue that we don't know, since we don't have a (generally accepted) answer to the following question: ...
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What sets the strength of the gravitational constant in our universe? On the other hand, most physics consists of finding nice approximate models for reality, and from this (top-down, get-things-done) point of view, there are lots of perfectly fine models (universes) w/o gravity!
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