小U博学!; Q# d, g/ x: l
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volocity = radius X owmega squared' ]: L. i3 [' ~; ~4 S5 a4 Y( J( D
The greater the radius, the greater the voloctiy, then the less pressure 8 m; m) s7 e" _& ~* f0 B3 \( b
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。% X0 i+ G# X5 V