Einstein's Gravito-Electromagnetism, Gravity of moving mass in General Relativity
Why Physics Stack Exchange recommends it
Physics Stack Exchange users link it when explaining or asking about the magnetic-like effect of moving mass, such as whether kinetic energy curves spacetime or whether such forces can be repulsive.
Recommended by 2 people across 2 different months, 2021 to 2023.
What it is
An animated explainer by Eugene Khutoryansky on gravitoelectromagnetism, the analogy between how a moving electric charge produces magnetism and how a moving mass produces an extra gravitational effect in General Relativity. It uses a relativity thought experiment with two observers, one at rest with the charges and one watching them move, to show why a magnetic-like gravitational force must exist.
What people said
Recommends Kshitij Kumar · 2022-01 · Physics Stack Exchange · on “New "gravity force" analogous to magnetic force?”
I was watching Eugene Khutoryansky's [LINK] physics video about Einstein's Gravito-Electromagnetism, Gravity of moving mass in General Relativity [this video] . In that, he discussed why maxwell's electromagnetism laws hold for special relativity also. He took the following situation: Adam is in a spaceship or the reference frame of two charged particles such that their gravitational force cancels their electromagnetic repulsion. Adam would see no magnetic force since charges are at rest according to his frame. Now Sarah is watching Adam from a ground reference and sees the charges moving and hence they must exert an attractive magnetic force pushing particles towards each other. But now Eugene,
Recommends Habouz · 2022-08 · Physics Stack Exchange · on “Does kinetic energy of an object curve spacetime?”
You are only a step in figuring out the answer. Both Energy and Momentum cause curvature. The curvature caused by energy is attractive. But the curvature caused by momentum is repulsive. There is an analogy between gravity and electromagnetism, called gravitoelectromagnetism. Similar to how the electric force (caused by charge density) is repulsive for two like charges, the magnetic force (caused by a moving charge) is attractive. This video I found might be helpful: [this video] For the advanced viewer who got stuck, a typical Lorentz transformation (Assuming the curvature is weak, or the observer is far away) would transform the coordinates of the stress-energy tensor the same way as how the Ri
Cites daniel · 2021-02 · Physics Stack Exchange · on “Do all forces of nature produce opposite force when they move?”
I am not sure if I understand it right but as I see it any two moving charge particles must repel each other like they are not moving relative to observer that moving at the same speed as they moving, according to this [this video] . but accept the magnetic force and gravity there is also the strong force and the week force would they produce force to the opposite direction as well in case they are moving?
Cites Vinicius Araujo Ritzmann · 2022-01 · Physics Stack Exchange · on “Could gravity around rotating bodies make them pull apart rather than attract? Due to the gravitational field analogous to the magnetic field”
In this video: [this video] Eugene explains that moving bodies generate two types of gravitational fields, the common one that attracts other bodies as we usually study gravitation in classical physics, and another similar to a magnetic field due to movement. This new gravitational field is necessary because of relativity and how electromagnetism works, it is the explanation of how two observers agree on the result of some experiments involving gravity and electromagnetism. I was surprised to find that the force generated by this new gravitational field is repulsive. A repulsive "gravitational" force. So I tried to imagine a scenario where this force would be able to make electrically neutral bod
Cites Yukterez · 2023-06 · Physics Stack Exchange · on “Big Ben Paradox?”
@Pat Dolan - In general relativity your quote from special relativity is useless. A moving mass has different gravity than a mass at rest, similar to a moving charge that also has different electromagnetic properties than one at rest, see here [this video] .