Re: Do magnets weigh less at the magnetic poles of the Earth?

I think the main point in this question is if the gravity and magnetic
properties of a body are related in usual materials. If this is the case,
the answer is NO. 

In fact, gravity changes according the mass distribution in the Earth. In
some regions it is stronger and in some places it is weaker. If we consider
an approximation to the Earth's figure as an ellipsoid, than the gravity
would be stronger at the poles, because there we would be closer to the
Earth's center of mass. But this is just a first-order approximation, and
this change in gravity can be detected only by very accurate and
sophisticated instruments called gravity meters.

On the other hand, near the poles (the magnetic poles, not the geographical
poles) we have the lines of magnetic force more concentrated, and a
stronger magnetic field. Depending on the configuration of an experiment,
we could use this force to enhance or counteract the gravity, but not in
the sense we could notice in ordinary conditions.

Best regards

Eder C. Molina
Dept. of Geophysics
Institute of Astronomy, Geophysics and Atmospheric Sciences
University of Sao Paulo - USP
Brazil