Science and Engineering


Not-So-Bouncy Balls

Drop a ball onto a flat surface, and it will bounce back up again. Maybe it will return to the height you dropped it from, but even the bounciest of balls will never go higher than that.

However, if you drop a stack of balls, with the lighter ones at the top, the top ball can soar far above its original height. Can you work out how high it goes?

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