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Mar24-08, 04:28 PM
belliott4488's Avatar
P: 666
Quote Quote by siphon View Post
The overall affect has to do with the momentum of the mass. The final transfer of this momentum will involve EM forces. The inertia of the mass makes this extreme enough to break the glass. Is this classical mass observation equal to GR space-time momentum being converted to the stresses placed on the EM force? At the lower ends of mass, GR arguments appear to break down relative to observation.
Can you explain what you mean by this?

Assuming we're not in the neighborhood of any large masses (as I believe you are), space-time is effectively flat here, so the rock follows a space-time geodesic that is essentially a straight line, just as with Newtonian gravity (which we expect, since GR reproduces Newton for flat space-time). Since both the glass and the rock want to follow straight line geodesics, but they instead run into each other, they undergo acceleration, and force etc.

How are you seeing the description of this event in GR?