Free fall and angular momentum
Free fall and angular momentum
复制标题
自由落体和角动量
DOI：
10.1119/1.19163
复制
发表时间：
1999
影响因子：
0.9
通讯作者：
P. Mohazzabi
中科院分区：
文献类型：
--
作者：
P. Mohazzabi
一个物体在旋转的地球表面附近自由落体（上升或下降）的问题被重新审视。通常用科里奥利力解释的物体的向东和向西偏转的表达式，是直接从物体相对于地球中心的角动量守恒推导出来的。同时还讨论了零侧向（东西）偏转的发射条件。这种处理方法在概念上和数学上都很简单，可以在物理入门课程中介绍。
The problem of free fall (rising or falling) of an object near the surface of the rotating earth is revisited. Expressions for the eastward and westward deflections of the object, which are normally explained by Coriolis force, are derived directly from conservation of angular momentum of the object with respect to the center of the earth. Launching conditions for zero lateral (east–west) deflections are also discussed. The treatment is simple enough, both conceptually and mathematically, to be presented in an introductory physics course.