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Introductory Physics Homework Help
Well of Death: Physics behind it
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[QUOTE="jbriggs444, post: 6833327, member: 422467"] In context, the relevant quote from [USER=673625]@Lnewqban[/USER] is: The idea is simply that a bicycle is unstable. Positive feedback. Tip a little, tip a lot and fall. In order to maintain something like a stable upright position, one needs some negative feedback. The standard way of providing this is with a rider who will steer the wheels right to prevent a rightward tip and steer the wheels left to prevent a leftward tip. This will typically be done with alternating steering inputs. Left until it tips right then right until it tips left and so on. [URL='https://www.youtube.com/watch?v=9cNmUNHSBac']This video[/URL] by Veritasium shows what happens when you lock the steering from being able to go one of those two ways. Yes, we understand that riding a bicycle is not quite as simple as blindly rocking the handlebars back and forth. But there will be some back and forth involved. Edit: Skilled riders can maintain an upright bicycle without steering input in a manner akin to tight-rope walkers. They trade off angular momentum (in the "roll" direction, not "pitch" or "yaw") for a sideways thrust with the tires on the pavement. A long pole can provide a nice pool of angular momentum to tap. Like [URL='https://ny.curbed.com/2015/9/30/9916096/world-trade-center-philippe-petit-the-walk']this[/URL]. [/QUOTE]
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Well of Death: Physics behind it
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