Hey -

CF argument:

Me and my freind are wearing roller skates...

I lay on my back, stick my feet up, and my freind climbs up, and stands on my skate wheels with her skate wheels.

Now - my skate wheels, and hers, will ROTATE at EXACTLY the same speed, if they roll at all...as they are in essence interacting like contact gears, or a tread mill, etc.

No matter HOW FAST my wheels rotate, hers will rotate EXACTLY at the same speed, MATCHING my wheel's speed....AND mine will match HERS.

OK, she's up there...and, CAN NOT move...because, if she rolls forward, mine will roll backwards the EXACT SAME AMOUNT.

My OTHER freind, named Jet, comes up behind her, and pushes her from behind.



She of course DOES NOT MOVE, because, no mater how fast he pushes her...my wheels will rotate just as fast as her's will.