摘要
针对传统向心力实验仪存在的不足,设计了电动向心力定量分析演示仪.该演示仪通过空心轴电机带动2个小金属球同时做匀速圆周运动,进而探究向心力大小F与质量m、角速度ω和半径r之间的定量关系.2个小球的质量m、角速度ω和半径r在实验的过程中均同时改变,测得的力为向心力的2倍.该设计使仪器运转更加平稳,测量的数据更精确,操作更方便.
In view of the shortcomings of traditional centripetal force tester,a demonstrator for measuring centripetal force quantitatively was designed.The improved device was driven by a hollow shaft motor to make two metal balls move in uniform circular motion at the same time,then the relations between centripetal force and mass and angular velocity were quantitatively explored.In the experiment,the mass,angular velocity and radius of the two pellets were changed simultaneously,so the force measured was twice as large as the centripetal force.But this design made the instrument run more smoothly,the measured data were more accurate,and the operation was more convenient.
作者
黎源逍
代伟
周雅梅
尚菡
LI Yuan-xiao;DAI Wei;ZHOU Ya-mei;SHANG Han(China West Normal University, Nanchong 637002, China)
出处
《物理实验》
2019年第2期59-62,共4页
Physics Experimentation
基金
西华师范大学人才培养质量和教学改革重大培育项目
关键词
向心力
电机
匀速圆周运动
centripetal force
motor
uniform circular motion
作者简介
黎源逍(1993-),男,四川广元人,西华师范大学物理与空间科学学院学科教育(物理)2018级硕士研究生,研究方向为学科教学论;通信作者:代伟(1964-),男,四川遂宁人,西华师范大学物理与空间科学学院教授,学士,主要从事大学物理实验教学与研究.
