再谈功的概念

Re-discussion on the Work Concept

功是物理学中最重要的概念之一,通过它可以实现各种形式的能量转换.当力的作用对象是非质点时,对功的概念的理解时常出现争议和误解.本文从作用在刚体上的力的性质出发,阐述对功的概念的理解和计算.

Work is one of the most important concepts in Physics,through which different kinds of energy conversion may be realized.For non-particle problems,however,misunderstandings and controversies on the concept of work take place occasionally.We clarify the concept of work and its calculation from the properties of forces acting on the rigid body.