物理摆测重力加速度g值的实验研究

物理摆测重力加速度g值的实验研究

关键词：物理摆;周期;重力加速度；可逆摆。

Experimental study of measuring the value of the acceleration of gravity with the physical pendulum

Abstract: Based on the analyses to the small vibration of the physical pendulum,we can use the physical pendulum of J—LD23 to measure the value of g by four different ways ,and analyze these data which were measured by computer. In the first way,we know the conjugacy of the physical pendulum,so we can find the conjugacy point through making the diagram of by using Mathematica and get the value of g.In the second way,based on the formula of the physical pendulum’s period,we can get the value of g through solving the simultaneous equations.In the third way, we can get the line of fit through using the least square method and get the value of g.In the forth way ,we use reversible pendulum to measure the value of g.At last,we get the value of g which were mensured by these four methods ,analyzing the sourses of the errors and the advantages and disadvantages of these four methods.

Keywords: physical pendulum;period; acceleration of gravity;reversible pendulum.

...............