论文部分内容阅读
有这样一道看来极其简单的题目: 在一列横波上一个处在平衡位置的质点的机械能就是: A.势能为零,动能最大;B.势能最大,动能为零; C.势能和动能均达最大;D.势能和动能均为零. 在教学过程中,我们发现,为数众多的学生均不加思索地选“A”,而有的老帅也会首肯这一答案,其实错了,正确答案应为“C”,用:在波的传播过程中,波动媒质中的质元动能和势能同时取得最大值,同时取得最
There is such a seemingly simple topic: The mechanical energy of a particle in a balanced position on a shear wave is: A. The potential energy is zero and the kinetic energy is the largest; B. The potential energy is the largest, and the kinetic energy is zero; C. The potential energy and kinetic energy reach Maximum; D. Both potential energy and kinetic energy are zero. During the teaching process, we found that a large number of students did not consider “A” without thinking, and some coaches would also approve this answer. It was actually wrong and correct. The answer should be “C”, using: In the process of wave propagation, the kinetic energy and potential energy of the qualitative element in the fluctuating media obtain the maximum value at the same time.