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在许多物理过程中,由于变化条件和规律的制约,物理量之间不仅存在着等量关系,而且还存在着大量的不等量关系。因此,在学习物理时,不但要考察物理量之间的相等关系,也要讨论物理量之间的不等关系,即要用到不等式的知识。下面以几题为例,来说明不等式在解决物理问题中的作用和一些常用的方法,目的是引起每个物理教师对这一问题的重视。不等式在解决物理问题中的应用,主要有以下几个方面: 一、在解答物理题时,常常需要把计算结果用不等式的有关知识进行分析、讨论例1.如图1所示, 细绳的一端拴一小球,另
In many physical processes, due to the constraints of changing conditions and laws, there is not only an equal relationship between physical quantities, but also a large number of unequal relationships. Therefore, when studying physics, we must not only consider the equal relationship between physical quantities, but also discuss the inequality between physical quantities. That is, we must use the knowledge of inequalities. The following uses several examples as examples to illustrate the role of inequalities in solving physical problems and some commonly used methods. The purpose is to cause each physical teacher to pay attention to this issue. The application of inequality in solving physical problems mainly includes the following aspects: 1. In solving physical problems, it is often necessary to analyze the calculation results using the knowledge of inequalities. Discussion Example 1. As shown in Figure 1, the string One end of a ball, the other