Day 133: Friction and the Battle Against Grinding

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Today we worked on one of my favorite problems, it goes something like this.

“Let’s say there are two people dancing a healthy 1 meter apart. We want to ensure that they stay a healthy 1 meter apart such that no one must take part in grinding. Let’s find an approximation for the coefficient of friction required to keep them separated.”

The kids love it, and it’s perfectly in time for prom.

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