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对称问题在物理习题中时常碰见,在解答这类问题时,如果能在“对称”二字上做好文章,往往能够快捷地解答问题.本文对常见的几种对称问题简解分类例举如下:1.运动过程对称对于可往复的匀变速直线运动,总存在着时间和速率的对称性,且加速度大小不变.例1 一人在离地H高度处,以相同的速率v~0同时抛出两个小球A和B,A被竖直上抛,B被竖直下抛,两球落地时间差为△t秒,求速率v_0 ?
Symmetric problems often come across in physics exercises. When answering such questions, if you can do well on the word “symmetry”, you can often answer the questions quickly. This article briefly explains some common symmetry problems. : 1. Symmetry of motion For reciprocating uniform linear motion, there is always symmetry of time and velocity, and the magnitude of acceleration does not change. Example 1 One person is at the same height from the ground and moves at the same rate v~0. Out of two small balls A and B, A is thrown upright, B is thrown upright, and the time difference between the landing of the two balls is Δt seconds. Find the speed v_0?