Reply
Wed 26 Sep, 2007 08:48 pm
If gravity's pull on an object in the General Relativity sense of the force is not based on weight but on the curvature of space time, wouldn't it require objects in a gravitational field to be undergoing some sort of movement for them to experience the effects?
No.
Imagine a ball-bearing on a ramp. It may start out stationary, but it will still roll down the incline.
Seems to me that everything is in motion relative to something. E.g. that ball bearing is moving due to spin of the earth etc. Wasn't a central issue for Einstein as opposed to Newton, that there is no "fixed" independent reference point ?
@ drewdad: your model assumes that there's some universal force pulling "down." I'm no expert in the field though, so maybe I forgot where that was written into general relativity.
Stumble It!
Tweet This
Bookmark on Delicious
Share on Facebook
Share on MySpace