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[Phys-L] Re: Quotation



Depends on your definition of perpetual motion, whether or not a
machine is involved, and which class of perpetual motion machine.

Newton's first law seems to insist that something _could_ move
forever...

some interesting web references:
<http://www.hp-gramatke.net/perpetuum/frame1.htm>
<http://www.phact.org/e/dennis4.html>


Scott



**********************************
Scott Goelzer
Physics Teacher
Coe-Brown Northwood Academy
Northwood NH 03261
603-942-5531e218
sgoelzer@coebrownacademy.com
**********************************


On Dec 22, 2005, at 8:23 AM, Carl Gaither wrote:

Hello to the group--

I came across a very interesting quotation:

"Physics proves to us the impossibility of perpetual motion among
visible,
tangible bodies, at the same time that it reveals to us a world where
perpetual motion is the rule--the world of molecules and atoms."
Burroughs, John
The Breath of Life
Chapter IX (p. 190)

I was just wondering how one would go about explaining why this
statement
must be false.

Carl Gaither
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