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运用物理图像分析解答物理问题可以使物理过程形象、直观,使复杂问题简单化,使解题过程简捷化,达到事半功倍的效果.利用图像解题的关键是明确图像中坐标轴所代表的物理量及其正负值的意义,明确点、线、面(面积)、斜率的物理意义.下面介绍几个图像解题的典型应用.一、运用图象定性判断例1.一列火车在恒定功率的牵引下由静止从车站出发,沿直轨道运动,行驶五分钟后速度达到20m/s.设列车所受阻力恒定,则可以判定列车在这段时间内行驶的距离
The use of physical image analysis to solve physical problems can make the physical process visual and intuitive, simplify the complex problems, simplify the problem-solving process, and achieve a multiplier effect. The key to solving problems using images is to specify the physical quantities represented by the axes in the image and The meaning of the positive and negative values, the physical meaning of points, lines, areas (area) and slopes. The following describes the typical applications of several image problem solving. First, the use of images qualitative judgment example 1. A train at constant power traction Starting from the station from the standstill, moving along the straight track, the speed reaches 20m/s after running for five minutes. The train is subjected to a constant resistance, then the distance the train travels during this period can be determined.