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Re: Conservation of ME and nonconservative forces

Bernard Cleyet wrote:

Very good Herb --

this is why a train has less friction than a rubber tyred auto.

for those who haven't thought about it -- the friction arises from the fact
that the rolling object and the surface rolled upon are not "infinitely"
hard (or smooth). I suspect in such a case, the ball would slide not roll.

Perhaps since you seem to be in the mood for this topic, you or John
D. might have some comments about:
Carl E. Mungan, Asst. Prof. of Physics 410-293-6680 (O) -3729 (F)
U.S. Naval Academy, Stop 9C, Annapolis, MD 21402-5026