摘要
本文确认经典理论中有关力的元功的定义的准确性。指出当前一些文章中,之所以对功的定义的严谨性产生怀疑的原因。给出了当力与作用物体之间有相对运动时,力的功的计算方法,很好地解释了工程问题中易于发生误解的一些实例。
This paper confirms the accuracy of the definition of the infinitesimalwork in classical theory and expresses the reason why some authors took askeptical attitude on the rigor of it. Some methods for calculating the work of a moving acting point on a bodyare given. They explain completely some confusing problems in practicalengineering.
关键词
σ函数
作用力
功
计算
元功
force of a moving acting point
work
δ function