摘要
通过梳理力对物体做功的计算方法,可以发现,按照曲线积分运算法则进行计算,选择合适的坐标系,换曲线积分为定积分,都能得到正确结果,不会出现功的计算结果符号错误等问题。通过一个关于功的例题的处理表明,可以在不同的坐标系下选择不同的变量进行功的计算,指出了部分文献中把功的定义式和计算方法放在同一个式子中的欠妥之处,不应该把功的计算方式和功的定义式等同起来,建议教师讲课时把功的定义和计算方法分成两部分讲授。
Some methods of calculating work of force are sorted out in this paper.If calculate work accord to the calculation rules of curvilinear integral in the appropriate coordinate system,and change the curvilinear integral into the definite integral,the correct results can be gotten.Some solving methods of the same problem in this paper show that the problems of work can be solved in various coordination systems with various independent variables,and that it is not proper to put the definition and calculation of work in the same function,for which suggest that we should teach definition formula and calculation methods of work separately.
作者
杜忠明
万猛
洪敦华
DU Zhongming;WAN Meng;HONG Dunhua(School of Physics and Electronic Science,Zunyi Normal College,Zunyi 563006,China)
出处
《清远职业技术学院学报》
2023年第2期74-77,共4页
Journal of Qingyuan Polytechnic
基金
遵义师范学院教学内容与课程体系改革建设培育项目“‘力学’课程知识点教学模式及考查方式改革研究”(JGPY2022018)。
关键词
功
表达式
计算方法
积分
work
definition formula
calculation method
integral
