06 September, 2010

Bike on an escalator

I've always wondered about this: if you have a bike facing downwards on an upward traveling escalator (or conveyor belt), is it possible to remain stationary? Or will the bike always roll downwards? I'm sure if the escalator's speed is constant, the bike will move, so if the bike is to stay stationary, the escalator's speed has to increase. That isn't to say if the speed increases, the bike will stay stationary.

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