基于PASCO转动实验装置的质点转动惯量测量

doi:10.3969/j.issn.1007-2985.2014.06.012

journal6 ›› 2014, Vol. 35 ›› Issue (6): 45-47.DOI: 10.3969/j.issn.1007-2985.2014.06.012

基于PASCO转动实验装置的质点转动惯量测量

全秀娥

（吉首大学物理与机电工程学院，湖南吉首416000）

出版日期:2014-11-25 发布日期:2014-11-27
作者简介:全秀娥（1969—），女，湖南张家界人，吉首大学物理与机电工程学院高级实验师，主要从事物理实验教学研究.
基金资助:
湖南省教育厅科学研究资助项目（13C750）

Measuring the Rotational Inertia of the Particle by the PASCO Rotating Experimental Device

QUAN Xiu-E

（College of Physics and Mechanical ＆ Electrical Engineering,Jishou University,Jishou 416000，Hunan China）

Online:2014-11-25 Published:2014-11-27

摘要/Abstract

摘要：为提高实验的精确度，减少实验误差，在PASCO转动实验装置中运用落体法对质点转动惯量进行测量.实验结果表明，下落加速度a应取v-t图像的斜率，并非a-t图像的截距；对同一转动系统，通过2次改变悬挂物的质量m下落来消除阻力矩对实验结果的影响；为了减少2次下落时阻力矩的误差，悬挂物的质量差Δm越小，实验结果越精确，相对误差最小值达到0.54%.

关键词： PASCO转动实验装置, 转动惯量, 下落加速度, 阻力矩

Abstract: Taking advantage of the PASCO rotational experiment device,the author measured the inertia of a particle through the law of falling bodies.It is found that the falling acceleration a should be the slope of the v-t graph instead of the intercept of a-t graph;and for the same rotation system,the influence of resisting moment on the experiment is eliminated by twice changing the mass m of the hanging object.To reduce the error of resisting moment at the second falling,the smaller the difference Δm is,the more accurate the experimental results will be,and the minimum relative error will reach 0.54%.

Key words: the PASCO rotating experiment device, rotational inertia, falling acceleration, resisting momen

全秀娥. 基于PASCO转动实验装置的质点转动惯量测量[J]. journal6, 2014, 35(6): 45-47.

QUAN Xiu-E. Measuring the Rotational Inertia of the Particle by the PASCO Rotating Experimental Device[J]. journal6, 2014, 35(6): 45-47.

基于PASCO转动实验装置的质点转动惯量测量

Measuring the Rotational Inertia of the Particle by the PASCO Rotating Experimental Device

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