功率,是描述力对物体做功快慢程度的一个较为抽象的物理量.在求某物体做功的功率,也就是求这个物体对别的物体所施加的作用力做功的功率时,只要我们构建适当的物理模型,找出这个物体对别的物体所施加的作用力及做功的特点,将抽象问题具体化,就能求解这类功率问题.例1在地球上空 Power is a relatively abstract physical quantity that describes the degree to which a force exerts its power on an object. When we ask the power of an object to do work, that is, to determine the power of an object to exert force on another object, we only need to construct appropriate physics. The model, to find out the force exerted by the object on other objects and the characteristics of the work done, and to specify the abstract problem, can solve such power problems. Example 1 Over the Earth