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能量既不会凭空产生,也不会凭空消失,它只能从一种形式转化为另一种形式,或从一个物体转移到另一个物体,在转化或转移的过程中其总量保持不变,这就是能量守恒定律,它是自然科学的通用规律,能量及其能量守恒是中学物理的一条主干线,它贯穿于力、热、电、光、原子物理的五大板块中,用能量守恒分析物理过程能突出物理过程的本质,给我们提供了一条十分重要的研究思路与方法。运用能量守恒解题必须熟记各种能量守恒的表达式和守恒条件。比如:
Energy can neither emerge from space nor disappear out of thin air. It can only transform from one form to another, or from one object to another, and its total amount remains the same in the process of conversion or transfer , Which is the law of conservation of energy. It is the common law of natural science. The conservation of energy and its energy is a main line of physics in secondary schools. It runs through five major sections of force, heat, electricity, light and atomic physics, and uses energy conservation analysis Physical process can highlight the nature of the physical process, provides us with a very important research ideas and methods. The use of energy conservation solution must be familiar with all kinds of energy conservation expressions and conservation conditions. such as: