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对于一些较为复杂的运动,用运动学公式或图像研究起来很困难,甚至一无所获,但是从能量角度看,任何复杂过程都满足能量守恒,这一特点与运动细节无关,也没有任何限制条件,学生只需关注不同能量之间的转化情况,就能使复杂运动问题简单化,因此,用能量守恒解题是学生必须掌握的解题技能。下面通过2015年高考题来说明如何运用能量守恒解题。
For some of the more complex exercises, it is difficult or even impossible to study with kinematic formulas or images, but from an energy point of view, any complicated process satisfies the conservation of energy. This feature has nothing to do with the details of the exercise nor any restrictions. The students Just focus on the conversion between different energy, you can make complex movement problems simple, therefore, the use of energy conservation problem solving is the students must master the problem-solving skills. The following 2015 entrance exam questions to illustrate how to use energy conservation problem solving.