Bungee Barbies, with a warning

via Matt Vaudrey and Illuminations, an activity that should probably produce linear data:

One word of warning, though, via Rhett Allain. It turns out that rubber bands don’t always work linearly. Everything’s fine if you pull back slowly on the rubber band.

But what happens if you pull the rubber band back a little faster and then hold it? This is what happens.

 

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