rationalskepticism.org

Xaihe wrote:Thanks everyone. So does this mean that the equivalence principle can't be applied to the center of a gravitational well?

Wikipedia wrote:In the physics of general relativity, the equivalence principle refers to several related concepts dealing with the equivalence of gravitational and inertial mass, and to Albert Einstein's assertion that the gravitational "force" as experienced locally while standing on a massive body (such as the Earth) is actually the same as the pseudo-force experienced by an observer in a non-inertial (accelerated) frame of reference.

http://en.wikipedia.org/wiki/Equivalence_principle