功的计算在中学物理中占有十分重要的地位,中学阶段所学的功的计算公式W=Fscosα只能用于恒力做功情况,对于变力做功的计算则没有一个固定公式可用。在具体应用中,求变功的问题无非两种情况,一种是需要直接计算出变力做功的值,代入过程分析式中求解其他物理量,另一种需由功能关系间接求解。本文对变力做功问题进行归纳总结如下: The calculation of work occupies a very important position in high school physics. The calculation formula of the work learned in the middle school stage can only be used for the work of constant force, but there is no fixed formula for the work of variable work. In specific applications, the problem of seeking meritorious service is nothing more than two cases, one is the need to directly calculate the value of the variable force work, into the process analysis to solve other physical quantities, the other need indirect solution by the functional relationship. This article summarizes the variable work done as follows: