大学物理中几个动力学规律的内在联系及其教学方法

现行力学及大学物理教材中传统恒力下的动力学例题,常常让学生感觉与中学内容重复,缺乏学习动力。为此,在这部分内容的体例设计与教学安排上,应重视知识体系与研究方法的整体构建。文章通过一道典型例题的多种解法,揭示了牛顿第二定律、动能定理、功能原理及机械能守恒定律的区别与内在联系,使学生不仅能熟练解决中学恒力、直线运动的特殊问...

Internal Relations among Some Dynamic Laws and Their Teaching Method

College students are often not interested in the examples with constant forces in textbooks of mechanics and college physics because they feel this content repeats that in physics course of middle school.Therefore,we should lay emphasis on the integrated construction of knowledge system and study method about the content in colleges.Through several resolutions of a typical problem,the internal relations and differences among Newton＇s second law,kinetic energy theorem,work-energy principle and law of mechanical energy conservation are investigated.By this way,students can understand the complexity of dynamic problems of college physics and improve ability to solve complicated problems.Besides,they may taste the difficulty and limitation of quantitative competition and try to find measures for such problems.