功和能是两个密切联系但又互不相同的物理量.当一个物体具有对外做功的本领时,我们就说这个物体具有能量.在做功的过程中伴随着能量的转化,在数量上,力对物体做了多少功,就有多少能量发生转化,所以,功是能量转化的量度.知道了功和能的这种关系,就可以通过做功的多少,定量地研究能量及其转化的问题了. Work and energy are two closely related but different physical quantities. When an object has the ability to work externally, we say that the object has energy. In the process of doing work, accompanied by the conversion of energy, in quantity, force So much work is done on the object, and how much energy is transformed, so work is a measure of energy conversion. Knowing the relationship between work and energy, we can study energy and its conversion quantitatively by doing much work .