动能和势能可以相互转化 ,这样的事例在自然界中有很多。其中有些比较直观 ,例如 :物体在空中自由下落 ,竖直上抛的小球等。有些事例比较复杂 ,例如来回荡着的秋千、斜向上射出的炮弹等。要正确判断在某过程中 ,是动能转化为势能 ,还是势能转化为动能 ,应注意以下几点 :首先 , Kinetic energy and potential energy can be transformed into each other. There are many examples in nature. Some of them are more intuitive, such as: free fall of objects in the air, small balls thrown upright, etc. Some examples are more complex, such as swings swinging back and forth, artillery shells that shoot obliquely upward. To correctly determine whether in a certain process kinetic energy is converted into potential energy or potential energy is converted into kinetic energy, the following points should be noted: First,