摘要
在同一个悬挂弹簧物理模型基础上,用不同的数据记录方式验证机械能守恒定律.传统的表格记录方式只能知道系统在光电门位置的机械能,若还想知道其他位置系统的机械能,需要多次调整光电门的位置.而通过位移传感器形成的图像记录方式,能够直接记录重物运动位移与时间之间的关系,通过对曲线拟合和一次求导,可以得到重物运动到任意位置时速度与时间之间的关系图像,从而能够计算得到重物运动到各个位置时系统的机械能.与传统的表格记录方式相比,图像记录方式不仅新颖直观,还更能充分验证机械能守恒定律.采用图像记录方式验证机械能守恒不仅是一种实验创新,也是对朗威DISLab软件和器材的创新使用.
Testing and verify the law of mechanical energy conservation on the basis of physical analog of hanging spring.We can only know the mechanical energy at photoelectric doors by traditional form record method,and we have to adjust the position of the photoelectric doors many times if we also want to know mechanical energy in other place.However,we can record directly the relationship image between the movement displacement of weight and time through image formed by displacement pickup,then we can know the relationship image between the velocity of weight and time when weight moves to any place through curve fitting and derivation,and we can calculate the mechanical energy of weight every place.Compared to traditional form record method,image record method is not only new and intuitive,but also testing and verify the law of mechanical energy conservation fully.Testing and verify the law of mechanical energy conservation by image record method is not only a kind of experimental innovation,but also a kind of innovation use of DISLab and experimental equipment.
作者
陈玲敏
刘爱云
Chen Lingmin;Liu Aiyun(Mathematics and Physics Department of Shanghai Normal University,Shanghai 200234)
出处
《物理通报》
CAS
2021年第12期107-112,共6页
Physics Bulletin
关键词
机械能守恒
DIS实验
数据记录
位移传感器
图像记录
the law of mechanical energy conservation
DIS experiment
data record
displacement pickup
image record
