落体法测量刚体转动惯量实验中引起测量值偏离的因素分析  

Error analysis in measurement of rigid body rotational inertia by falling body method

作　　者：王海林[1] 司嵘嵘[1] 李相银[1] 

机构地区：[1]南京理工大学物理实验中心,江苏南京210094

出　　处：《物理实验》2012年第5期25-27,30,共4页Physics Experimentation

摘　　要：测量并分析了落体法测量刚体转动惯量实验中拉绳与转轴的不垂直对刚体转动惯量测量值偏离的影响,得出了转动体系在阻力矩作用下的角加速度与转速的关系.该值偏离的测量与分析可作为刚体转动惯量实验的拓展性、创新性实验内容,有利于启发学生实验思维和培养学生实验创新意识.In the experiment of measuring the rigid body rotational inertia by falling body method, the influence of the non-perpendicularity between the rope and the rotational axis on the measurement accuracy was analyzed. The relation between the angular acceleration and the rotational speed was also measured and analyzed under resisting moment. The measurement and error analysis could be viewed as an extension and improvement of the original experiment, which was helpful to enlighten the experiment thinking and cultivate the creative consciousness of the students.

关 键 词：刚体转动惯量 测量误差 角加速度 

分 类 号：O313.3[理学—一般力学与力学基础]