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功的定义式中的位移到底是指物体的位移,还是指力的作用点的位移,不同的文献有不同的说法。虽然在中学阶段,将物体看成质点时,两者是没有区别的,但从功的概念的形成过程来看,它应该指物体的位移;如果采用力的作用点的位移,在某些情况下计算功时会得到错误的结论:再通过几道例题的深入分析也发现:用“作用点上物体的位移”来表示功的定义式中的位移,更准确一些。
The definition of work in the end of displacement refers to the displacement of the object, or the point of displacement of force, different literature has a different view. Although there is no difference between the two when considering the object as a particle in the middle school stage, it should refer to the displacement of the object from the formation of the concept of merit. If the displacement of the point of force is used, in some cases Under the calculation of work will get the wrong conclusion: And then through a few examples of in-depth analysis also found that: the “role of the point of displacement of the object ” to represent the definition of work displacement, more accurate.