对绳不可伸长问题的探析

• 作 者: 刘春蒲
• 机 构: 陕西省西安市田家炳中学,
• 出 处: 中学物理教学参考
• 发表日期: 2011年04期
• 关键词: 物理现象 物理过程 细绳 中学物理 动摩擦因数 牛顿第三定律 物理模型 动量定理 解题过程 物理状态

一、问题的提出在力学问题中,很多研究对象是通过绳连接着,连接物体的绳从松弛到绷紧,或由绷紧到突然剪断(或断裂),这一突变的物理现象或特殊的物理过程一般发生在物体的运动过程中或平衡状态破坏之时,其往往具有一定的隐蔽性和抽象性.而学生在审题分析时又对这一特殊的物理现象总是疏忽,对绳这一理想

First, the problem raised In mechanical problems, many of the study object is connected by a rope, connecting the rope from the object to slack tension, or by taut to a sudden cut (or fracture), the sudden change in the physical phenomenon or special Physical processes generally occur during the movement of the object or the destruction of the equilibrium state, which often has a certain degree of covertness and abstraction, while students in the exam analysis of this particular physical phenomenon is always negligent, the rope ideal