大学物理 ›› 2024, Vol. 43 ›› Issue (10): 26-.doi: 10.16854/j.cnki.1000-0712.230443

• 教学讨论 • 上一篇    下一篇

非质心系的角动量定理

韩卫华,刘青芳,王建波,王丽   

  1. 兰州大学 物理科学与技术学院,甘肃兰州 730000
  • 收稿日期:2023-12-01 修回日期:2024-02-26 出版日期:2024-11-15 发布日期:2024-11-29
  • 作者简介:韩卫华(1979—),男,山东济宁人,兰州大学物理科学与技术学院教授,博士,主要从事大学物理力学教学和电化学能源材料与器件的研究工作.
  • 基金资助:
    2022年度拔尖计划2.0研究课题(20221040)资助

Angular momentum theorem in a non-centroid system

Han Wei-hua, Liu Qing-fang, Wang Jian-bo, Wang Li   

  1. School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
  • Received:2023-12-01 Revised:2024-02-26 Online:2024-11-15 Published:2024-11-29

摘要: 选择适当的参考点在解决刚体运动问题中至关重要, 能有效简化问题处理. 相对于质心转轴, 非质心系提供更为灵活的视角. 本文通过推导非质心系的角动量定理, 以小球碰撞自由杆模型为例, 展示了其在实际问题中的应用. 本文为读者提供了处理刚体运动问题的新思路, 特别是在复杂情境下更为直观. 

关键词: 角动量定理, 非质心参考点, 碰撞

Abstract: Choosing an appropriate reference point is crucial in solving rigid body motion problems, effectively simplifying the problem-solving process. In comparison to the center of mass axis, a non-centroid axis of rotation provides a more flexible perspective. This paper, by deriving the angular momentum theorem in a non-centroid system and using the example of a ball colliding with a free rod, illustrates its practical application in real-world scenarios. The paper offers readers a novel approach to addressing rigid body motion problems, particularly providing intuitive insights in complex situations.

Key words: angular momentum theorem, non-centroid system, collision