Quote:
Originally posted by XPLORx4:
Quote:
Originally posted by BlueSky:
[b]Regardless of whether a wheel is driven through a drivetrain or rotates freely, it covers a given distance per rotation. ... Again, this is true regardless of what's driving the wheel forward.
No, it's not. In the scenario of a freewheeling wheel, what's driving it forward?[/b]
Well, if the wheel moves, something is causing that, correct? It could be a guy pulling his kid in a Radio Flyer or a soap box derby racer coasting, but if the wheel is moving, it is covering a given distance per rotation. If that distance is negated by a moving surface underneath that moves an equal distance in the opposite direction, the vehicle will not move relative to its surroundings.