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中学物理学习的动机是学生活动中产生的心理驱动,使其产生直接推动学习的源动力.教师要站在科学方法论的高度,解读题型,注意物理问题的通俗和推理性,分类归档,精选典型例题加以分析.本文以动量守恒定律题型分析问题,理解掌握在系统不受外力或所受合外力为零时,系统的动量守恒.系统动量是系统内几个物体的动量的矢量和,守恒是指系统的大小和方向都不变.系统内物体体间的相互作用力称之为内力,可以是弹力、摩擦力等;本文同时研磨动量守恒定律问题中的
The motivation of high school physics study is the psychological drive in student activities, which leads to the direct driving force of learning.Teachers should stand on the height of scientific methodology, interpret the types of questions, pay attention to the popularization and reasoning of physical problems, Select typical examples to be analyzed.This paper analyzes the problem with the law of conservation of momentum law to understand that the momentum of the system is conserved when the system is not subjected to external forces or the applied force is zero.The system momentum is the vector sum of the momentum of several objects in the system , Conservative refers to the size and direction of the system are unchanged.System interaction between objects called internal force, can be elastic, friction, etc .; this law at the same time grinding law of conservation of momentum