“功和功率”在中考物理中是常考的知识点,考点一般涉及判断力是否做功、功和功率及机械效率的含义、功和功率的相关计算等内容。对于这部分内容的解题思路,下面通过实例进行详解。一、判断力是否做功力不做功的情境题在中考题中是常见的,每年各地都有相关题目出现。根据机械功的计算公式W=Fs,可知力不做功的情形有三种:有力作用,但物体没有运动;没有力作用,但物体在惯性下有移动距离;有力作用, “Power and power ” in the test physics is often test knowledge points, test centers generally involved in the judgment of whether the work done, power and power and the meaning of mechanical efficiency, power and power calculations and so on. For this part of the problem solving ideas, the following examples through the detailed. First, determine whether the ability to do the work situation is not common problem in the examination questions, each year there are related topics appear. According to the calculation formula of mechanical work W = Fs, we can see that there are three kinds of situations in which no work is done: powerful, but no movement of objects; no force, but objects have a moving distance under inertia;