在物理中考和初中物理竞赛中有一类题是“非单调变化”试题,有的学生由于未掌握其特点及解法,故在解此类问题时感到较难。我们把物理习题中某物理量在某一过程中一直变大或一直变小的变化叫做单调变化、把某物理量在某一复杂过程中,先变大而后变小或先变小而后变大的变化叫做非单调变化。解“非单调变化”问题的思路是:将其分解为两个简单的单调变化过程;步骤是;先在“非单 There is a class of questions in the physics and junior high school physics competitions that are ”non-monotonous change“ questions. Some students find it difficult to solve such problems because they do not have their own characteristics and solutions. We call the change of a physical quantity in a physical process in a certain process to become larger or smaller all the time. It is called a monotonous change. In a certain complex process, a certain physical quantity becomes larger first and then smaller or smaller and then larger. This is called non-monotonic change. The idea of ​​solving the ”non-monotonous change“ problem is: break it down into two simple monotonous changes; the steps are; first in the ”non-single