$ H) M1 G) w6 z1 l" v$ dvolocity = radius X owmega squared . u+ l" a. ?# u5 OThe greater the radius, the greater the voloctiy, then the less pressure - i4 c8 R! ~" t. N6 w6 l/ a0 W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。0 @6 d2 h- [/ ^5 I