两个一半问题,是物理学中较常见的一类题型之一,由于在计算过程中需要一定的教学技巧,如果不能灵活运用,就无法对答案作出正确的判断,会出现耗时伤脑而不见效的局面.现用计算法和双线图解法来比较它们的难易,并在教育中同时实施两种方法解题,相信程度差的和程度好的学生都能有所收益,达到共同掌握解这类题的方法.例举如下:例1 甲乙两人同时从 A 地到 B 地,甲走前一半路程的速度为 v_1,后一半路程的速度为 The two-half problem is one of the more common types of questions in physics. Due to the need for certain teaching techniques in the calculation process, if it is not applied flexibly, it will not be able to make correct judgments on the answers and it will cause time-consuming brain damage. Instead of the effective situation, we use current calculation methods and two-line graphic methods to compare their difficulty, and implement two methods to solve the problem simultaneously in education. We believe that students with poor grades and good degrees can make a profit and achieve The methods for solving such problems are jointly grasped. Examples are as follows: Example 1 Both A and B move from A to B at the same time. A is halfway through the distance and the speed is v_1. The speed in the second half is