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Physics
Special and General Relativity
How does curvature of spacetime affect the motion of test particles?
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[QUOTE="sqljunkey, post: 6545989, member: 600972"] If I had a chart of Cartesian coordinates and it had four axis's, t, x, y and z, how would I induce motion of a test particle by curving those axis's ? If the test particle was standing still and only moving in the t axis, how do i get it to move in the other axis's, x, y, z. I can understand a photon particle doing all kinds of things when I curve that spacetime, because it already is moving in space, either the z x and y. If I have an object that is standing still, and I curve that spacetime to a point, that object should keep standing still. Unless the whole coordinate system is being dragged at some rate towards the point. Everybody says oh yeah, all these test particles are freefalling along these geodesics, and I drop a mass in there and whatever curvature happens is okay, it's just motion man. This is the stuff that never got explained to me very well, it's like every test particle is moving everywhere, in every direction, at all times, and I drop this mass in there and all of a sudden these test particles start converging towards it. And then I ask myself what about the object that is standing still and not moving in the x, y, z coordinates. [/QUOTE]
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Physics
Special and General Relativity
How does curvature of spacetime affect the motion of test particles?
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