Science Memes

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we are but a gravy train in outer space (mander.xyz)

submitted 7 months ago by [email protected] to c/[email protected]

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[–] [email protected] 16 points 7 months ago (1 children)

I put it in my force balance equations, it's a force. It doesn't matter that it's from curving spacetime rather than exchanging particles, it still exerts force on things.

[–] [email protected] 2 points 7 months ago (1 children)

But the point of general relativity is that a free-floating observer is equivalent to an observer in free space. That means that falling due to gravity, which you call a force, is an unaccelerated movement, i.e. no force.

[–] [email protected] 1 points 7 months ago (1 children)

If I take a relativistic frame of reference. If I take an 'absolute' non moving frame of reference, gravity shows up as a force. I use the later for calculating loads and statics, even though it's technically not correct. And in that case gravity shows up as a force.

[–] [email protected] 0 points 7 months ago

I'm not trying to argue approximations. Physics is just approximations all the way down. But as a physicist, I also love arguing about technicalities, and that's also kinda the point of science communities for me.