能量问题的教与学是高中物理中的一个重难点,对高中能量问题的教与学现状入手,抓本质,分析规律。提出利用动能定理与机械能守恒定律结合,创新的开辟使用能量守恒的方法进行教与学。通过结合分析物体的受力情况,列出物体初末状态机械能。中间除重力外的其他力做功即为物体的机械能变化量的原因所在。让学生理解机械能变化的原因,能量转化到哪里去。将抽象的概念转化为直观、明朗的能量关系。从现象到本质的方法,也是高中物理分析题目,构建解题思路的重要方法途径之一。通过实际授课,发现确实能够使学生更容易理解能量间的相互转化,更好地掌握能量规律,更好地运用能量守恒方法求解出题目。 Teaching and learning energy problems in high school physics is a heavy and difficult point, high school energy problems teaching and learning to start with the status quo, grasp the essence of the law. Proposed the use of kinetic energy theorem and the law of conservation of mechanical energy, innovation and open up the use of energy conservation methods of teaching and learning. By combining the analysis of the force of the object, the mechanical properties of the object in the initial and final state are listed. In addition to the middle of the force of gravity other than the power that is the reason for the amount of mechanical energy changes. Allow students to understand the reasons for changes in mechanical energy, energy conversion where to go. Transform the concept of abstraction into an intuitive and clear energy relationship. From the phenomenon to the essence of the method, but also high school physics analysis of the problem, one of the important ways to build problem solving ideas. Through the practical teaching, we can find that students can indeed understand the mutual transformation of energy more easily, grasp the law of energy better, and use energy conservation method to solve the problem better.