构造法是物理解题中的一种富有创造性的思维方法,即在思维活动中,根据解决问题的需要,构想特定的物理模型,使问题化难为易,化隐为显,得到巧妙而简捷的解决.下面通过典型实例说明构造法在物理解 The construction method is a creative thinking method in the matter of understanding, that is, in thinking activities, according to the needs of solving problems, the specific physical model is conceived, so that the problem is difficult to make, hidden and obvious, and clever and simple. Solve. Here is a typical example to illustrate the construction method in object understanding.