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物理习题中涉及函数图象的问题不少,概括起来有以下几种:1.习题中作为”已知条件给出的函数图象.这类题,往往是考查读图、识图的能力.解答时应注意:图线与坐标轴的交点所对应的物理意义;图线间的交点及其物理意义;图线的拐点或特殊点的斜率及其物理意义;图线与坐标轴所围的面积及其物理意义.2.习题中没有直接给出,但是为了解题方使,有时根据题意,作出相应的函数图象.同样也应注意上述几个点、线、面及其对应的物理意义.3.在解题过程中,经一定的分析推理,得到相关的函数关系式,根据函数关系式作出函数图象,再对图象进行分析研究,以利解题.对于这类函数图象问题同样要注意上述的几个点、线、面及其相对应的物理意义.上述三类函数图象问题,有关图象的应用大同小异.本文仅举一例说明.例题;在光滑的水平面上,放着两块长度相同、质量分别为民M_1和M_2的木板,在两木板的左端各放一个大小、形状、质量完全相同的小物块.开始时,各物均静止,今在两小物块各作用一水平恒力F_1、F_2,当物块与木板分离时两木板的速度分别为V_1和
There are many problems involved in function images in physical exercises. To sum up, there are the following types: 1. Exercises are given as a function image given by known conditions. Such questions are often the ability to examine drawings and maps. When answering, attention should be paid to the physical meaning corresponding to the point of intersection between the graph line and the coordinate axis, the point of intersection between the graph lines and their physical meaning, the slope and the physical meaning of the inflection point or special point of the graph line, and the line surrounded by the graph line and coordinate axis. The area and its physical meaning. 2 is not directly given in the exercises, but in order to understand the problem, sometimes according to the meaning of the problem, make the corresponding function image. Also should pay attention to the above points, lines, surfaces and their corresponding Physical meaning. 3. In the process of solving problems, after a certain amount of analytical reasoning, get the relevant functional relationship, make function images according to the functional relationship, and then analyze and study the image to solve problems. For these functions The image problem should also pay attention to the above-mentioned several points, lines, surfaces and their corresponding physical meanings. The above three kinds of functional image problems, the application of the relevant images are much the same. This article only gives an example to explain. Examples; in a smooth horizontal plane On the stand, two pieces of the same length and quality were The wooden boards of Min M_1 and M_2 are each provided with small pieces of the same size, shape, and mass on the left ends of the two boards. At the beginning, everything is stationary, and a horizontal constant force F_1, F_2 is applied to each of the two small pieces. The velocity of the two boards when the blocks are separated from the boards is V_1 and