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A Moment of Gravity

FEB 01, 2002
Marcelo Alonso

In a note entitled “An Optical Stretcher” in Physics Update (Physics Today, November 2001, page 9 ), the term “center of gravity” is incorrect. The correct term is “center of mass.” Gravity has nothing to do with conservation of momentum.

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Marcelo Alonso, (alonso@iu.net) Florida Institute of Technology, Melbourne, Florida, US .

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This Content Appeared In
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Volume 55, Number 2

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