Re: [Phys-L] gravity along a chord
>In any case: The time for a trip through ANY chord is the same as the time
>for a trip through the diameter (ignoring rotation and friction).
It is probably worth noting that all of this assumes that the earth is a
uniform density as well. Estimates like this one
(http://en.wikipedia.org/wiki/Gravity_of_Earth#mediaviewer/File:EarthGravityPREM.svg)
suggest that the g is remarkably close to 10 m/s^2 almost half way down to the
center of the earth because the density id much greater near the center than
near the surface.
Tim