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That one's got Mythbusters written all over it!
On Dec 2, 2011, at 1:33 PM, John Denker wrote:
A skater stands way off center on a rotating ice rink, partaking only of the
platform motion, and holding weights in her outstretched hands.
If she brings in her arms, will she begin to spin about her platform
position?
1) That is a nice clarification of the question.
2) The answer is undoubtedly yes.
P.S. I once made a video of myself seated on a portable rotating
platform that was, in turn, placed near the edge of one of those
playground rotating platforms. I placed a video camera at the other end
and taped myself as I brought my hands in toward my body and away.
Robert A. Cohen, Department of Physics, East Stroudsburg University
570.422.3428 rcohen@esu.edu http://www.esu.edu/~bbq