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在使用现行中学物理课本进行“机械振动和机械波”一章教学的实践中,我有以下几点粗浅的体会和认识。 1、把握好教学的分寸机械振动是一种比较复杂的机械运动。学生在过去所学的运动形式里,有的是加速度的大小和方向都不变的运动,如匀速直线运动和匀变速直线运动;有的是加速度的大小不变而方向改变的运动,如匀速圆周运动。而在机械振动中,加速度的大小和方向都将发生变化。至于机械波,由于涉及许多质点的集体振动,就较机械振动更为复杂。鉴于中学
In the practice of using the current middle school physics textbooks to teach the “mechanical vibration and mechanical waves” chapter, I have the following few superficial experiences and understandings. 1. Grasp the teaching of measuring mechanical vibration is a more complex mechanical movement. Some of the types of movements that students have learned in the past are those in which the magnitude and direction of acceleration do not change, such as uniform linear motion and uniform linear motion; some are motions in which the magnitude of acceleration does not change and the direction changes, such as uniform circular motion. In mechanical vibration, the magnitude and direction of acceleration will change. As for the mechanical wave, it is more complicated than the mechanical vibration due to the collective vibration involving many particles. Given the secondary school