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By that definition electrical attraction is also not a force, because a charged particle will curve in an electrical field.
by ars 4y ago
By that definition electrical attraction is also not a force, because a charged particle will curve in an electrical field.
- jenadine 4y agoMaybe indeed electromagnetic charges curves space time as well, is there a theory for that? According to general relativity, in absence of forces, an object follow a geodesic in space-time. Which we approximate to an uniform motion in straight line for high school physics. But masses "curve" the space time, so there are no straight line. If there was no intramolecular forces to keep the apple on the tree, it would follow a geodesic that would make it fall towards earth. The same way that if the seat was not applying a force to my back, I would be pushed backwards in an accelerating car.
- BlackFly 4y agoKaluza-Klein theory is a geometric unification of general relativity and electromagnetism. A description of electricity as a curvature of a fifth dimension. https://en.m.wikipedia.org https://en.m.wikipedia.org /wiki/Kaluza%E2%80%93Klein_theory If I recall correctly, the description of charged matter is somewhat problematic.
- nextaccountic 4y ago> Maybe indeed electromagnetic charges curves space time as well, is there a theory for that? There is https://en.wikipedia.org/wiki/Kaluza%E2%80%93Klein_theory https://en.wikipedia.org/wiki/Kaluza%E2%80%93Klein_theory
- vbezhenar 4y agoElectromagnetic field has some energy. Energy and mass are equivalent (e=mc2). So electromagnetic field curves space time.
- chao- 4y agoA key difference is that we have identified a force-carrying particle for the electromagnetic force (photon), whereas we have not been able to prove a force-carrying particle for the effect we observe as gravity.
- BlackFly 4y agoExcept that the radius of curvature in that case depends on the charge and mass of the particle, but all particles follow the same trajectory in a gravitational field. The trajectory is a geodesic, a non-Euclidean generalization of a straight line. All objects travel on straight lines unless acted upon by forces: inertia.
- ars 4y ago> but all particles follow the same trajectory in a gravitational field That's not true. The "all masses fall at the same speed" thing is only true when one mass is much larger than the other. (Well, it's never actually true, it's more "is only a useful approximation".) So heavier masses follow different trajectories in a gravitational field, just like more charged particles do.