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volocity = radius X owmega squared 7 j6 l% x9 r6 GThe greater the radius, the greater the voloctiy, then the less pressure $ W$ o/ v( I- S6 y# 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。( ] ?7 t$ {! A. @- X. A. l! H( d