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“中学物理”杂志在2007年第9期和2008年第3期中两位老师分别从速度的定义和速度的分解两个不同的角度分析了牵引物体的速度的求解方法,读后受益匪浅.笔者在教学实践中发现从物体间能量守恒的角度入手,使用“功率相等法”来分析相关物体的速度,效果不错,现推荐给大家.一、原理探究当两个物体(或质点)直接相互作用或通过无能量储存和消耗的连接物(如不可伸长的轻绳或刚性轻杆)作用时,不论是哪种情况,组
In the “Second Physics” magazine in the 9th issue of 2007 and the 3rd issue of 2008, the two teachers analyzed the speed of the traction object from two different perspectives: the definition of speed and the decomposition of speed. Shallow. The author found in the teaching practice to start from the point of view of energy conservation between objects, using the “equal power method” to analyze the speed of related objects, the effect is good, is now recommended to everyone. First, the principle explores when two objects (or Whenever a particle interacts directly or through a connector that has no energy to store and consume, such as an inextensible light string or a rigid light rod, in either case, the group