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在力学习题中,往往会遇到突变或迅变并伴随着物理过程联锁变化的一些问题,也会遇到连续运动导致的突变或迅变运动的产生。这些问题给出的物理图象往往只有一个,单从一个图象来分析一连串变化过程中各物理量间的动态关系是困难的,怎么办?让一个静止的物理图象“动”起来,好比用高速摄象机获得的图象用慢动作分解开来,这里是指根据物理过程特征,绘制若干特殊状态图象,即对一组物理图象进行“动态分析”,问题也就不难解决了。下面举例说明。
In the force study questions, there are often problems involving abrupt changes or rapid changes and accompanied by changes in the interlocking of physical processes, as well as the occurrence of mutations or rapid movements caused by continuous motion. These questions often give only one physical image. It is difficult to analyze the dynamic relationship between physical quantities in a series of changes from one image. What to do? Let a static physical image be “moved”, like using The images obtained by high-speed cameras are decomposed in slow-motion. Here, we refer to the drawing of a number of special-state images based on the characteristics of the physical process. That is, a “dynamic analysis” of a group of physical images is not difficult to solve. Now. The following is an example.