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在会考及其它考试中,有些力的合成与分解问题用一般作图法往往难以解答。若借助圆来分析,则变得明了、直观、简单。现分类说明如下:1.两分力大小一定,利用圆确定合力大小的范围。方法:先画出一个较大的力F_1的示意图,再以此力的末端为圆心,以较小的力F_2的大小为半径画圆。根据力的三角形法则,从F_1的起点到圆上任一点的连线都表
In the examinations and other examinations, some of the force synthesis and decomposition problems are often difficult to answer using general mapping. If you use the circle to analyze, it becomes clear, intuitive, and simple. The classification is as follows: 1. Two-component force is certain, use circle to determine the size of the resultant force. Method: Draw a schematic diagram of a large force F_1 first, and then use the end of this force as the center, and draw the circle with a smaller force F_2. According to the triangular law of force, the connection from the starting point of F_1 to any point on the circle is