Comment on we are but a gravy train in outer space
JohnDClay@sh.itjust.works 6 months agoI 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.
Chrobin@discuss.tchncs.de 6 months ago
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.
JohnDClay@sh.itjust.works 6 months ago
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.
Chrobin@discuss.tchncs.de 6 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.