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本文以力的合成知识为基础,从一组判断题的分析,说明分析力的合成应掌握的技巧和方法。一、基础知识如果一个力F的作用效果跟两个力F1、F2同时作用的效果相同,那么力F可替代F1和F2,F称为F1和F2的合力,F1和F2称为F的分力。(1)当F1、F2同向时,F=F1+F2;(2)当F1、F2反向时,F=F1-F2;
This article is based on the synthetic knowledge of force, from the analysis of a set of judgment questions, explains the skills and methods that should be mastered in the synthesis of analysis power. First, basic knowledge If a force F has the same effect as the two forces F1 and F2, the force F can replace F1 and F2. F is called F1 and F2’s resultant force, and F1 and F2 are called F’s. force. (1) When F1 and F2 are in the same direction, F=F1+F2; (2) When F1 and F2 are reversed, F=F1-F2;