底部触地后链条的下落运动  

Movement of a falling chain after its lower end touches ground

作　　者：赵中华[1] ZHAO Zhong-hua(Liaoning Geology Engineering Vocational College,Dandong 118008,China)

机构地区：[1]辽宁地质工程职业学院,辽宁丹东118008

出　　处：《辽东学院学报（自然科学版）》2018年第4期292-298,共7页Journal of Eastern Liaoning University:Natural Science Edition

摘　　要：针对已观察到的链条下端落到桌面后其余部分运动更快的现象,分析了运动更快的原因,在做了小角度近似后,得出链条的下落先是加速度大于g的匀加速运动,然后是加速度等于g的匀加速运动,由此计算出下落时间和运动加快的程度,并将实测结果与理论计算结果做了比较。The reason for why the other parts of a falling chain move faster when its lower end touches the ground was analyzed. After using a small angle approximation, it was found that the upper parts of the chain moved in a uniformly accelerated motion with acceleration greater than g at first and then less than g. Theoretically, the falling distance and time are calculated. Besides, an experiment was designed and the results are compared with those of the theoretical computation.

关 键 词：快链条 下落运动 自由落体 

分 类 号：O313.4[理学—一般力学与力学基础]