流体在做匀速旋转运动时会产生与静止状态不同的动力学效应，主要体现在液体内部的压强变化以及由此带来的 　　附加浮力，可形象地称之为“离心浮力”.本文就V 形管惯性离心力演示仪中的小球运动问题进行深入讨论，通过求解曲面积 　　分求得小球所受“离心浮力”公式，进而求出小球的运动方程，并对实验中出现的现象进行定量分析解释.

The dynamic effect of the fluid in the constant rotation of the fluid is different from that of the stationary state. It is mainly embodied in the change of the pressure inside the liquid and the additional buoyancy，which can be called " centrifugal buoyancy" . We discuss V-shaped tube inertial centrifugal force demonstration instrument in the depth of the ball movement in-depth discussion，by solving the surface integral obtained by " centrifugal buoyancy" formula. Then we find the equation of motion and the phenomenon of quantitative analysis of the interpretation of the experiment.