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I think. [[User:Dpbsmith|Dpbsmith]] 08:44, 2 January 2007 (EST)
 
I think. [[User:Dpbsmith|Dpbsmith]] 08:44, 2 January 2007 (EST)
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OK, Dpsmith, you win on your point about what a perpetual motion machine ''really'' means.  But I'm still interested in why perpetual motion (without producing extra energy) is impossible.  The increase in entropy must prevent it.  Underlying that may be the uncertainty principle in quantum mechanics.
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More thought and research would be worthwhile here.  I think we're all convinced that the motion would eventually stop.  But why?  What force stops it? --[[User:Aschlafly|Aschlafly]] 22:36, 2 January 2007 (EST)
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