2 d j+ r$ j2 Lvolocity = radius X owmega squared4 ^2 k- {1 `2 f( F- b+ Q7 O, t
The greater the radius, the greater the voloctiy, then the less pressure & |' `. a4 l, s4 q- ~. 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。* y) s) n% M0 W9 w' P& i6 M