论文部分内容阅读
本文拟在以下几方面探讨极值法在解题中的应用。 1 极值问题的物理解法 极值问题的物理解法优点在于它更强调了物理过程的分析,使得出的结论所依据的物理图景更为清晰,也就更有利于我们对物理规律的理解和应用。 例1 甲、乙两小孩各乘一辆冰车在水平面上游戏,甲和冰车的质量为 M=30 kg,乙和冰车的质量也是30kg。游戏时,甲推着一个质量m=15kg的箱子,和他一起以大小为vo=2.0m/s的速度滑行,乙以同样的大小的速度迎面
This article intends to discuss the application of the extreme value method in the following aspects. 1 Material understanding of the extremum problem The material understanding of the extremum problem has the advantage that it emphasizes the analysis of the physical process and makes the physical picture on which the conclusion is based to be clearer, which is more conducive to our understanding and application of the physical laws. . Example 1 A and B children each ride an ice car to play on the horizontal plane. The quality of the A and B ice cars is M=30 kg, and that of the B and B ice cars is also 30 kg. In the game, A pushes a box with mass m=15kg, and gliders along with him at a speed of vo=2.0m/s, and B greets at the same speed.