功是高中物理的重要概念,且高考中又经常涉及到此类问题,但由于高中阶段所学的功的计算公式W=Fscosα只能用于恒力做功情况,若不注意它的适用条件,往往会得出错误的结论.现在结合几例谈变力做功问题常见的解决办法.一、等值法等值法即若某一变力的功和某一恒力的功相等,则可以通过计算该恒力的功,求出该变力的功.而恒力 Work is an important concept of high school physics, and often involves such issues in the college entrance examination, but due to the calculation formula of the work learned in high school stage W = Fscosα can only be used for constant power work, if you do not pay attention to its applicable conditions, It often leads to erroneous conclusions. Now a few common solutions to the problems of variable power are combined. First, the equivalent law method means that if the work of a variable force is equal to the work of a constant force, it can be Calculate the work of the constant force and find the work of the variable force. Constant force