$ R1 j- D7 Z: l; v/ ?2 avolocity = radius X owmega squared+ w# ]0 `' M$ @% t0 a
The greater the radius, the greater the voloctiy, then the less pressure 1 f/ {: v2 o( X( R ]; _( Y4 m
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。* C# _3 X2 l0 Z. Q% B$ L/ j