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Old 04-17-03, 03:44 PM
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hayneda
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Originally posted by DnvrFox
I was referring to the rock on the string. In a vacuum, without any force applied, it would slow down and stop spinning eventually.
Only due to the very small amount of friction of the string--sorta like the wheel bearings. If it is spinning in a vacuum, and there was no "bearing" friction, it would spin forever (regardless of it's orientation w.r.t. gravity). Of course, there will always be some friction as we can't make a perfect bearing. As for the string, it would have "bearing" friction at the point where it was held as it flexed and/or twisted from rotation.

Dave
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