逆向思维法是把运动过程的“末态”作为“初态”的反向研究问题的方法,如把物体的加速运动看成反向的减速运动,物体的减速运动看成反向的加速运动的处理,该方法一般用在末状态已知的情况,特别是末速度为零的情况,若用常规解法,未知量多,列出的方程多,解的过程繁琐,巧用逆向转换法,可将问题转化为熟悉的初速度为零的匀加速直线运动的各量的比例关系,使问题迎刃而解. Reverse thinking method is the process of the “end state ” as the “initial state ” the reverse method to study the problem, such as the object of the accelerated movement as a reverse deceleration, the object of the deceleration movement as an inverse To accelerate the movement of the process, the method is generally used in the last known situation, especially in the case of the end speed is zero, if the conventional solution, the unknown amount, the listed equations, the solution of the process cumbersome, clever Reverse conversion method, the problem can be converted into a familiar initial velocity of zero uniform acceleration linear motion of the proportion of the amount of the problem solved.