【摘要】 本文以刚体力学中最典型的物体与直杆的碰撞问题为例，从分析受力的角度，对动量守恒和角动量守恒定律的应用条件进行了讨论，以加深对两个守恒定律的理解，希望对教师教学或学生自学起到一定的借鉴作用.更多还原

【Abstract】 In this paper, the most typical collision problem between an object and a slender bar in rigid body mechanics is taken as an example, and the application conditions of the law of conservation of momentum and conservation of angular momentum are discussed from the perspective of force analysis, in order to deepen the understanding of the two conservation laws, hoping to play a certain reference role for teachers’ teaching or students’ self-study.更多还原