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临界问题是中学物理中的常见问题,而且结合牛顿运动定律的求解也很多,临界点是物理过程转化的转折点,同时对应极值出现,在临界点的两侧,物体的受力情况、运动状态一般要发生变化,准确找到临界点,并确定极值是解决问题的关键。
The critical problem is a common problem in middle school physics. There are also many solutions to the Newtonian law of motion. The critical point is the turning point of the physical process transformation. At the same time, the corresponding extreme value appears. On both sides of the critical point, the force situation and the movement state Generally change, find the critical point accurately and determine the extreme value is the key to solve the problem.