在学习机械振动一章时 ,简谐振动是本章重点内容 ,经多年的教学实践发现 ,不论是在高一初学过程中 ,还是到高三复习时 ,不少学生对如下几个问题模糊不清 :( 1 )振子在T/ 4时间内的位移大小与振幅的关系 ,许多学生认为应该等于一个振幅A ;( 2 )学生对振子在T/ 2时间内各物理量变 In the chapter on learning mechanical vibration, harmonic vibration is the focus of this chapter. After many years of teaching practice, many students have ambiguous questions about whether they are in the first year of high school or the third year of high school. (1) The relationship between the magnitude and amplitude of the displacement of the vibrator during the T/4 period, which many students believe should be equal to an amplitude A; (2) The student changes the physical quantity of the vibrator within T/2 time