4 L, d) l' i1 J( `1 u5 Ivolocity = radius X owmega squared 1 L: h5 b! O* r# D% qThe greater the radius, the greater the voloctiy, then the less pressure 5 l# `" f$ I, Y' W6 P0 c7 e2 \% _! F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。# M/ P9 f* g b$ F, l1 m