滚动的小球在水平旋转平台上运动分析

Research of a Ball Rolling on a Horizontal Rotating Platform

对第29届国际青年物理学家锦标赛的第11题——"在一个盘上翻滚"进行了理论和实验研究,运用理论力学中的相关知识进行了理论推导,自行设计装置对其进行参数上的研究,得到小球质心的运动规律。将小球质心的运动规律与带电粒子在磁场中运动轨迹可以做类比,发现了两种运动规律的相似性,为学生学习理论力学给出了一个很好的例子。

The research of a ball rolling on a horizontal rotating platform is based on the11th problem of29th International Young Physicists’Tournament.We have used the method of theoretical mechanics to research the problem,considered a variety of experimental parameters,designed a device to carry out this experiment,and required themain principle of this motion.There are many similarities between the principle that a ball movingon a discand the principle of electron moving in magnetic field.It can give an example to studythe theoretical mechanics using this physical model.