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在解决物理问题时,首先要根据给定的物理情景来建立适当的物理模型,然后运用已知的物理规律列出符合题意的数学表达式.物理模型与数学表达式之间是通过物理规律作为纽带而紧密相连的,一个物理模型可以对应着一个或几个数学表达式,只有从整体上把握这几个数学表达式之间的联系,才能正确地理解物理模型的涵义.反之,一个数学表达式也可能对应一个或几个物理模型,这种不确定性会导致错解的出现,下面通过还原物理模型的方
When solving physical problems, we must first establish an appropriate physical model according to a given physical scene, and then use known physical laws to list the mathematical expressions that meet the meaning of the question. Physical models and mathematical expressions are based on physical laws. As closely linked, a physical model can correspond to one or more mathematical expressions. Only by grasping the connection between these mathematical expressions can the meaning of the physical model be correctly understood. Expressions may also correspond to one or more physical models. This uncertainty can lead to the appearance of misunderstandings.