用气轨系统与Spss测定重力加速度

Measure the gravity acceleration by air- track system and SPSS

使气轨处于水平方向的动态平衡状态下,通过设定系统质量,调整系统在竖直方向上所受的外力,用物理天平称量滑块质量,用智能计时系统测出滑块在水平方向的加速度。由实验原理、不确定度分析,用Spss的线性估计功能分析实验数据,得到系统质量-加速度综合量与竖直方向砝码质量的定标曲线,并验证得系统质量-加速度综合量与竖直方向的砝码质量存在线性关系,由此标定出重力加速度,并用置信概率为95%的不确定度对实验数据及其结果进行分析和评价,得到较为合理的实验结果。

Leave the air - track on the dynamic equilibrium in the horizontal direction, set the mass of the system, adjust the force in the vertical direction and weight the mass of the slider block with physical balance, and measure the horizontal acceleration of the slider block with intelligent timing system. According to experiment principle, uncertainty analysis and analyzing the experiment data by the linear estimation of SPSS, we obtain the calibration curve between the mass of the system - acceleration comprehensive variable and the mass of the weight in vertical direction. Furthermore, we testify that there exists linear relationship between the mass of the system - acceleration comprehensive variable and the mass of the weight in vertical direction. So, we cali- brate the gravity acceleration, analyze and evaluate the experiment data and result with the uncertainty confi- dence probability of 95 %. It＇ s shown that we gain reasonable experiment result.