高中物理“机械能”一章中关于作用力与反作用力做功的关系,许多学生搞不清楚,认为作用力与反作用做功的关系是:一个做正功,另一个必然做负功,这是错误的,实际上作用力做功与反作用力做功之间没有一定的联系.作用力与反作用力做功有以下6种情况:(1)作用力与反作用力都做正功;(2 In the high school physics “mechanical energy” chapter, the relationship between force and reaction force work is unclear. Many students think that the relationship between acting force and counteractive work is: one is doing positive work, and the other is necessarily doing negative work. This is wrong. Actually, there is no definite link between work done by the force and work done by the reaction force. There are the following 6 situations in which the force and reaction force do work: (1) Both the acting force and the reaction force do positive work; (2