ELI5, How am I able to go farther and faster on my bicycle than by walking, considering I have to move the mass of the bike, as well as the loss of energy to friction from the gears and wheels?
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Do note that on steep uphills, the bike is less efficient than walking. At some point the bike is pretty much just extra weight and slows you down, especially since you need to maintain a minimum speed to avoid falling over on the bike.
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