摘要
测量重力加速度的方法有很多,教学实践过程中发现,用FB210C型复摆实验仪测得的重力加速度值与理论值偏差较大,究其原因发现:(1) FB210C型复摆实验的周期公式存在二次近似处理,一是小角摆动视为简谐振动,二是近似将砝码所在位置视为摆动系统的质心位置;(2)仪器和操作步骤上产生的误差也不容忽视。针对误差的来源不同,提出减少误差的改进方法。
There are many methods for measuring the gravitational acceleration.It is found in teaching practice that(1)the value of gravity acceleration measured by the FB210C pendulum tester deviates greatly from the theoretical value.It is found that there is a quadratic approximation to the periodic formula of the FB210C pendulum experiment.One is that the small Angle oscillation is regarded as simple harmonic vibration,and the other is that the position of the weight is approximately regarded as the position of the center of mass of the oscillating system;(2)The errors in instruments and operating procedures cannot be ignored.In view of the difference of the old sources of error,an improved method to reduce the error is proposed.
作者
梁玉娟
钟友坤
袁通全
韦兰香
罗立江
LIANG Yujuan;ZHONG Youkun;YUAN Tongquan;WEI Lanxiang;LUO Lijiang(Department of Physics and Electronics Engineering,Hechi University,Hechi,Guangxi 546300,China)
出处
《河池学院学报》
2018年第5期52-56,86,共6页
Journal of Hechi University
基金
广西教育教学改革工程A类资助项目(2017JGA280)
河池学院高层次人才资助项目(XJ2018GKQ018)
国家级大学生创新训练资助项目(201710605011)
关键词
FB210C型复摆实验仪
重力加速度
单摆法
自由落体法
误差
FB210C compound pendulum tester
gravitational acceleration
simple pendulum method
free fall method
error
