初中应用物理知识竞赛有关功和机械能部分各个知识点的联系非常紧密.一个物体能够做功,我们就说这个物体具有能量;物体能做的功越多,它具有的能量就越大.物体做功时,它具有的能量要发生变化.机械能是最常见的一种形式的能量.这里分五个专题进行讲解,五个专题是:功、功率、动能和势能、机械能及其转化、机械能的利用. Junior high school Applied Physics Quiz about the power and mechanical energy part of the various knowledge points are very close.An object can do work, we say that this object has energy; object can do more work, it has more energy. , It has to change the energy.Mechanical energy is the most common form of energy.There are five topics to explain here, five topics are: power, power, kinetic energy and potential energy, mechanical energy and its conversion, the use of mechanical energy.