摘要
飓风球是一种非常有趣的物理现象,两个连接在一起的钢球在吸管吹气的作用下以极高频率旋转。当旋转速度超过某一临界值时,一端的小球将会翘起而脱离桌面。本文从刚体动力学的角度,利用角动量定理对飓风球的翘起过程进行了动力学的分析,得到了翘起角度与转速之间的关系以及不同直径小球翘起的临界角速度,并通过实验进行了验证。
As a fascinating physical model, the Hurricane balls which are made by two steel balls that are joined together, can be spun at incredibly high frequency by blowing on them through a drinking straw. As the angular velocity exceeding a critical value, one of the balls rise to the air and no more contact with the desktop. In this paper, the motion of Hurricane balls is analyzed by using the angular momentum theorem from the view point of the rigid body dynamics. The relations between the raised angle and the angular velocity, as well as the critical angular velocity with the different diameters are obtained and verified by experiments.
作者
苏晓强
张玉
程留永
SU Xiaoqiang;ZHANG Yu;CHENG Liuyong(College of Physics and Information Engineering,Shanxi Normal University,Linfen,Shanxi 041004)
出处
《物理与工程》
2020年第5期127-131,共5页
Physics and Engineering
基金
山西省研究生教育改革课题(2019JG102,2019JG103)
山西师范大学教学改革创新项目(2019JGXM-28,2019JGXM-29)。
关键词
飓风球
翘起角度
临界角速度
IYPT
Hurricane balls
raised angle
critical angular velocity
IYPT
作者简介
苏晓强,男,副教授,主要从事物理教学科研工作,研究方向为量子信息科学,suxq@mail.ustc.edu.cn。
