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The Surprising Physics of Pulling a Bike With a Rubber Band

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The Surprising Physics of Pulling a Bike With a Rubber Band
> http://www.wired.com/2015/09/surprising-physics-pulling-bike-rubber-band/

> Do you need some practice with force diagrams for your introductory
> (or advanced) physics course? Here are three questions (and the last
> one is awesome) about the motion of a bike as it is pulled.

> Update
>
> Chad Orzel brings up a very interesting point about this whole
> “pulling on the bottom” case.
>
> Key to @rjallain‘s bike trick is that you’re not exerting torque
> around the hub of the wheel, but about the contact point with
> ground.
>
> — Chad Orzel (@orzelc) September 18, 2015
>
> If you think of the bike wheel rotating about a point where it
> touches the ground instead of rotating about the center of the wheel,
> you might get this question correct. Chad also claims that if you
> pulled the bike at the exact bottom (where it touches the ground),
> the bike would just slide and not roll. I agree.


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The Surprising Physics of Pulling a Bike With a Rubber Band Sam Wormley <swormley1@gmail.com> - 2015-09-19 08:56 -0500
  Re: The Surprising Physics of Pulling a Bike With a Rubber Band benj <none@gmail.com> - 2015-09-19 13:47 -0400
  Re: The Surprising Physics of Pulling a Bike With a Rubber Band jimp@specsol.spam.sux.com - 2015-09-19 17:58 +0000

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