离心力现象（离心力一组）

        容器内流体以相同角速度旋转时，在重力和离心力共同作用下，液面呈抛物面状；两水管中，因木球密度比水小，受到的离心力小于水的向心液压力，故木球向下运动，而钢球正相反；钢片环受离心力作用，水平方向直径变大，导致竖直方向直径变小，形成椭圆。

Centrifugation

        While the fluid is rotating at same rotational speed, under the joint effect of gravity and centrifugal force, the surface would be like paraboloid. Within two water pipes, because wood ball’s density is smaller than that of water, and the centrifugal force upon the wood ball is smaller than the water’s centrifugal hydraulic pressure, then the wood ball moves downward. The steel ball is on the contrary. Under the effect of centrifugal force, the ring made of steel flake would form an ellipse The ring’s diameter in horizontal direction would be bigger and its diameter in vertical direction would be smaller.