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学习单摆的振动周期公式:T=2π(L/g)~(1/2)以后,在学生已有的知识基础上,列出下列问题,引导学生分析解决,以达到开发学生智力。培养学生解决实际问题的能力的目的。 1.如何利用单摆测定列车的加速度? 可将一单摆悬挂在列车车箱的顶板上,观察单摆的摆动方向,若摆线向后倾斜,则列车的加速度向前,若摆线竖直向下,则列车匀速前进或处于静止状态,加速度为零。若摆线向前倾斜,则列车减速前进,加速度向后。
After studying the pendulum’s vibration cycle formula: T=2π(L/g)~(1/2), based on the students’ existing knowledge, the following questions will be listed to guide students in the analysis and solution in order to achieve the development of student intelligence. The purpose of training students’ ability to solve practical problems. 1. How to use a single pendulum to measure the acceleration of a train? A single pendulum can be hung on the top plate of the train car to observe the swing direction of the pendulum. If the cycloid is inclined backward, the acceleration of the train will move forward, if the cycloid is vertical. Downwards, the train moves forward at a constant speed or at a standstill with zero acceleration. If the cycloid is tilted forward, the train decelerates and the acceleration is backward.