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Originally Posted by roboteer49
... speed can be adjusted in gears but torque cannot, right? So, here's my question, if two robots were identical and one had chips and the other drills with gearbox(high and low) who would win in a pushing match?
thanks 
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err, close...both speed and torque can be adjusted through gear ratios, but the output power of the motors stays constant.
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Originally Posted by Matt Adams
Power output = torque x angular velocity.
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with that being said, the winner of your hypothetical pushing match would depend on the gearing of both robots. but assuming that you geared each bot in such a way that they had identical coef. of friction, speed, and efficiency (in short, torque would be the only diff.) the bot powered by drills would come out on top since it is more powerful.