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Mathematical
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Oscillating Bouncer.
Balls are connected by springs: four balls, so six springs. You may drag any of the balls out of position at the start - or not - then push the check button. Push the left arrow button to reinitialize. The X-button goes back to the tutor menu page. Inelastic collisions with the walls and floor, so it should settle on floor eventually. This is another example of a shocked movie that evolves unpredictably because it contains its own internal dynamics. I like these a lot.

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