中学教材中,有关力的合成和分解这一课题,既是教师讲课的难点,又是学生学习的难点。对学生来说最感觉困难的是遇到具体问题怎样进行力的分析,从而根据题意画出准确的力的矢量图来。本文想就这方面谈谈自己的体会。力的合成和分解这一课题首先是在力的平衡中提出的。根据牛顿第一运动定律知道,要 Secondary school textbooks, the synthesis and decomposition of the force of this issue is not only difficult for teachers lectures, but also difficult for students to learn. The most difficult for students is encountered in the specific problems of how to analyze the power, so as to draw accurate vector power to the idea. This article would like to talk about your own experience in this regard. The subject of force synthesis and decomposition is first of all proposed in the balance of forces. According to Newton’s first law of motion to know, to