Re: Magnets

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#781

From: Steve Luzader
Date: Thu, 23 Feb 1995 03:39

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   Small ( 1 cm diameter, mass a few gm) rare earth magnets are available
from places like Edmund Scientific, American Science Center, etc.
Lowell's comment about using them on air tracks, etc., reminds me of
a linear drag experiment I saw set up somewhere (I think it was Keene
State in New Hampshire) in which holes were drilled in the skirts of
air track gliders and the small magnets pressed into the holes.
Eddy currents induced in the aluminum air track produce a drag force
proportional to the velocity of the glider.  That struck me as a
pretty slick experiment.

Steve Luzader
sluzader@fre.fsu.umd.edu

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Subject: Re: Magnets
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