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Originally Posted by MikeK
I disconcur with this ... this sentence:
... implies that the wheels on the plane are free to move at any speed, and the conveyor belt will automatically change speed to match.
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Yeah, but there's no way to get the wheels moving to begin with. Think of it this way: if the wheels *have* to spin at the same speed as the belt, there's no way for the wheel's axles to *ever* move relative to the ground around the belt, and therefore there's no way for the plane to ever move.
'Course, there are no physics behind that solution... it's just taking the problem definition to a new level...