How does it change the system? You simply add like 10kg to one end and 10kg to the other so to speak... you simply add the same pulling force to both ends, so it would be as if it would never be there as it would cancel out anyways in those equations. It's like saying x/y wouldn't be the same as x+10 / y+10.... (x and y being those formulas or whatever you have in above posts). And come to think of it, that even goes no matter if there is friction or not!
Or take both ends of such a chain in your hands and let yourself hang... you aren't going to move all of sudden, the chain isn't going to pull you up on one side; you would hang there motionless (assuming you would weight the same or less than the chain).
quote:
Originally posted by gif83
P.S. perpetual motion is possible in theoretical physics where such things as frictionless planes exist.
yeah, but friction or not, the chain wouldn't move, even in theory. I think the frictionless thingie is just to throw you off or something...
blah... going to sleep now before I change my mind again
quote:
Originally posted by gif83
Close your eyes and count SonicSams
aaaaaarrgggghh noooooooo
EDIT: I just thought of another way of seeing it and prove why it wouldn't move (you get that when you're counting SonicSams
): look at the two limits of the system. In the first limit example, the two planes have an infinite small angle (aka flat): the chain wouldn't move, no matter how long one end is, and friction or not. In the other limit example, the two planes are both 90°, which means both ends of the chain simple hang strait down from a point right in the middle of the chain, again, no movement, no matter if there is friction or not.... back to counting SonicSams now...
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