小U博学! ! z6 i2 D( B( B7 m/ n0 a! W2 H6 p. K z' C/ `0 N+ P
volocity = radius X owmega squared7 f7 O. F5 x4 ^" S
The greater the radius, the greater the voloctiy, then the less pressure # z; p7 Z/ m) R0 j
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。) P* G" z6 e. M+ G