探究落球法测液体黏度实验中小球达匀速运动所需的时间  

Time needed for reaching constant speed when measuring liquid viscosity using falling-ball method

作　　者：王丽娟[1] 张平[1] 

机构地区：[1]常熟理工学院物理与电子工程学院,江苏常熟215500

出　　处：《物理实验》2009年第1期37-39,共3页Physics Experimentation

摘　　要：在落球法测液体黏度的实验中,用实验和理论分析分别对小球无初速度进入液体至达到匀速运动所用的时间进行了探究.结果表明,这段时间是极短的,从而纠正了长期以来认为小球由静止下落后需经过一段时间后才能达到匀速运动的观点.In the experiment of measuring liquid viscosity using falling-ball method, the interval for the ball to reach constant speed in the liquid is analyzed with theory and experiment. The result indicates that the interval is quite short, and that the viewpoint that it will take quite a long time for the ball to fall during this process is incorrect.

关 键 词：落球法 黏度 数码相机 

分 类 号：O311[理学—一般力学与力学基础]