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Date: Thu, 19 Feb 1998 08:53:04 -0500
From: Tim Folkerts <Tim.Folkerts@valpo.edu>
To: phys-l@atlantis.uwf.edu
Subject: Re: Apparent weight
Message-ID: <SIMEON.9802190804.A@muahost.valpo.edu>
On Wed, 18 Feb 1998 20:32:23 -0600 (CST) "A. R. Marlow"
<marlow@loyno.edu> wrote:
In GR gravitation is very real: it is the effect of living in and moving
through curved spacetime. The real geometric curvature of spacetime
cannot be transformed away by any coordinate transformations, say to
accelerated reference frames, so it is about as real as you can get.
How do other forces, like E&M fit in to GR? Imagine the earth having a
net charge, and a person having enough charge that electrostatics
exactly counterbalance gravity (and ignore rotation). Is the "inertial
frame" still the one accelerating downward at -9.8 m/s due to curved
space time, or is it the one with no acceleration.