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动能定理是整个高中物理教学中的核心内容,从功和能的角度揭示了物体所受合外力做的功(或物体所受各力做功的总和)与物体的动能变化量之间的关系,反映了做功是能量转化的量度.这一规律也是高考的重点、热点问题,除了要明确研究对象,分析运动过程以外,动能定理方程的建立过程中往往还涉及到位移和速度这两个关键性物理量,从学生的解题实际看,在这两个物理量的分析上学生容易出问题.本文就结合具体的例题进行分析,旨在促进学生对动能定理表达式中各物理
The kinetic energy theorem is the core content in the entire high school physics teaching. From the angle of power and energy, the relationship between the work (or the sum of the work done by the object) and the kinetic energy of the object is revealed. Reflects the work is a measure of energy conversion.This rule is also the focus of college entrance examination, hot issues, in addition to a clear research object, the analysis of the movement process, kinetic energy theorem equation establishment process often involves two key displacement and speed Physical quantity, from the students ’problem-solving fact, students are apt to have problems in the analysis of these two physical quantities.In this paper, the author analyzes specific examples to promote students’