生活中大家谈到“功”时,往往有“贡献”如功劳、立功或“成效”如成功、事半功倍的意思.在力学中,功描述的是物体所受的力在路程上的积累,它是物体能量转化的量度,即物体做功的过程就是能量转化的过程,物体做多少功,就有多少机械能与其他形式的能发生转化.功的概念通常而言,如果一个力作用在物体上,并且物体在这个力的方向上移动了一段距离,我们就说这个力对物体做了功.因此,做功包括两个必要因素:一是物体受到力的作用,二是物体在这个力的方向上移动了 When people talk about “work” in life, they often have “contribution” such as credit, meritorious merit, or “effectiveness”. If they are successful, they will do more with less. In mechanics, work describes the force exerted on an object. Accumulation on the journey, it is a measure of the transformation of the energy of the object, that is, the process of the work of the object is the process of energy conversion. How much work the object does, how much mechanical energy and other forms of energy can be transformed. The concept of work is usually a The force acts on the object, and the object moves a distance in the direction of this force. We say that this force does work on the object. Therefore, the work includes two necessary factors: one is the effect of the force on the object, and the other is the object Moved in the direction of this force