高考中三种碰撞模型综述

• 作 者: 田斌道
• 机 构: 青海省格尔木市第一中学 81600
• 出 处: 数理化学习(高中版)
• 发表日期: 2002年18期
• 关键词: 碰撞模型 结体 碰撞问题 小物 动摩擦因数 速度方向 弹性势能 动能定理 碰撞过程 模型类型

回顾历年高考物理力学中碰撞问题,不难发现有三种典型的碰撞模型,即弹簧连结体在弹簧伸缩过程中的碰撞模型;不可伸缩的绳连结体在绳从松驰到绷紧过程的碰撞模型;木板(或小车)与小物块相对运动的模型.这三种典型的模型一般情况下在不受外力或内力远大于外力情况下动量是守恒的,但其碰撞过程各有

Looking back at the collision problems in the physical mechanics of college entrance examinations over the years, it is not difficult to find three typical collision models, namely the collision model of the spring-connected body in the spring stretching process; the collision model of the non-scalable rope-connected body during the slack-to-tightening process of the rope. The model of the relative movement of wood (or trolley) and small objects. These three typical models generally conserve momentum without being affected by external forces or internal forces. However, the collision process has its own