动量定理尽管在高考中只要求定性讨论,不要求作定量计算,但本人在平时教学中发现有些题目直接看来,不好找出突破口,难以下手,但倘若用“动量定理”来考虑,问题便会豁然开朗,下面举例讨论。 Although the momentum theorem only requires qualitative discussion in the college entrance examination, and does not require quantitative calculations, I found that some topics in the ordinary teaching directly look, it is difficult to find a breakthrough, it is difficult to start, but if the “momentum theorem” to consider, the problem You will suddenly see the light, as discussed below.