Ball on water-beam
Drawn to the jet.
Table tennis balls float on a water fountain: how is that possible?
The ball doesn’t stay exactly in the center of the jet. It rotates because, on one side, it meets the water and slows down, while on the other, it speeds up. On that side, the suction is stronger, as explained by Bernoulli’s principle. Result: it’s drawn to the jet!
Play with the Bernoulli effect: blow between two parallel postcards – they stick together.
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