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研究物理,主要是寻找不同物理量之间的变化关系,确定了物理量之间存在某种变化关系,就要把这种关系表示出来。表示物理量之间变化关系的方法有两种:公式和图像。公式给出的关系比较严谨,定量描述了两个或几个物理量之间的依赖关系,因此公式是学生解决物理问题的重要依据。相比之下,图像在表达物理量之间的关系上更具有优势:(1)可以把公式给出的函数关系利用图像表示出
The study of physics, mainly to find the relationship between the different physical changes, to determine the relationship between the physical quantity of a change, it is necessary to express this relationship. There are two ways to represent the changing relationship between physical quantities: formulas and images. The formula gives a more rigorous relationship, quantitative description of the relationship between two or several physical quantities, so the formula is an important basis for students to solve physical problems. In contrast, the image has more advantages in expressing the relationship between the physical quantities: (1) The function relation given by the formula can be expressed by using an image