有关动量守恒问题是高考的必考内容,也是高考的重点和热点。此类问题通常把牛顿运动定律、能量守恒、动量守恒与临界条件分析相结合,综合性强。要突破此难点,笔者认为深刻理解几种典型模型不失为一种好方法。本文以高考题为例,介绍三种典型模型,谈谈解决这类问题的解题思路。一、碰撞模型例1滑块a、b沿水平面上同一条直线发生碰撞;碰撞后两者粘在一起运动;经过一段时间后,从光 The issue of conservation of momentum is the college entrance examination will be the content, but also the focus and hot college entrance examination. Such problems usually combine Newton’s law of motion, conservation of energy, conservation of momentum and analysis of critical conditions with high comprehensiveness. To break through this difficulty, I think it is a good idea to deeply understand several typical models. In this paper, taking the college entrance examination questions as an example, we introduce three typical models and talk about solutions to these problems. First, the collision model Example 1 slider a, b along the same plane on a straight line collision; after the collision between the two stick together to move; after a period of time, from the light