How does one moving slowly cause the others to go faster and faster?
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If one gear has 10 teeth and the other has 100 teeth, then the small one turns 10 times for every 1 turn of the big one. The teeth are linked, so the rotation is counting teeth. You still need the power to turn the wheels, though.
Bicycles have mechanisms for changing the gear ratios, so you can move your legs at a comfortable speed even if you’re going slow or fast.
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