基于三力汇交原理分析均质杆的平衡问题  

Analysis of the Balance of Homogeneous Rod Basedon the Principle of Three Forces Converging

作　　者：慎晨乐 沈卫(指导) Shen Chenle;Shen Wei(Linghu High School,Huzhou,Zhejiang 313018)

机构地区：[1]湖州市菱湖中学,浙江湖州313018

出　　处：《物理通报》2022年第8期95-97,共3页Physics Bulletin

摘　　要：高中阶段在有关均质直杆的平衡问题中,当杆受3个非平行力时,可以采用三力汇交原理来定量分析杆的受力情况,这样既可以避开对力矩平衡关系的运用,也可以加深同学们对于共点力平衡知识以及三角几何关系的认识与运用.When the students in senior high school are facing the problem of the balance of a homogeneous straight bar and the bar is subjected to three non parallel forces,the principle of three forces intersection can be used to quantitatively analyze the force on the bar,which can not only avoid the application of the moment balance relationship,but also deepen the students′understanding and application of the common point force balance knowledge and the triangular geometry relationship.

关 键 词：均质直杆 三力汇交 共点力平衡 相似三角形 

分 类 号：G634.7[文化科学—教育学]