小U博学!4 E# g2 k5 y6 c
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volocity = radius X owmega squared& }9 c0 D, p8 }% F
The greater the radius, the greater the voloctiy, then the less pressure 1 e) l4 Y5 i' R8 n
上面杯子的半径大,转速快,压力小。反之下面的半径小,转速慢,压力大。所以产生了一个升力,从而托住了杯子。+ H/ Q' f" u" T