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动量和能量是力学中两个重要的物理量,各类竞赛和考试的压轴题都有所涉及.尤其是碰撞问题.过程繁杂,形式多样,将动量守恒定律、功能原理、能量守恒定律融合在一起.本文以四类常见的形式为例说明.
Momentum and energy are two important physical quantities in mechanics. The titles of various competitions and exams are involved. Especially the collision problem. The process is complex and diverse in form. It combines the laws of conservation of momentum, functional principles, and the law of conservation of energy. This article takes four common forms as an example.