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At 15:50 25/09/00 , Michael Edmiston wrote:
All of this is perfectly clear, but Doug's comment I replied to suggested
simply that in free fall one can achieve *neither* a net displacement nor
rotation in the absence of an external push. I'm pointing out that while
this is true for translational motion, it's not true for rotational motion.
You *can* achieve a net rotation while maintaining zero angular momentum,
the difference being that you can play around with I but not m.