题目内容
(8分)某实验小组在利用单摆测定当地重力加速度的实验中:用游标卡尺测定摆球的直径,测量结果如图所示,则该摆球的直径为_______ cm.
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250040018254742.jpg)
某同学先测得摆线长为89.2 cm,,然后用秒表记录了单摆振动30次全振动所用的时间如图甲中秒表所示,则:该单摆的摆长为__________cm,秒表所示读数为______s。
为了提高实验精度,在实验中可改变几次摆长l,测出相应的周期T,从而得出一组对应的l与T的数值,再以l为横坐标T2为纵坐标,将所得数据连成直线如图乙所示,则测得的重力加速度g=________________.
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250040017784828.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500400179312954.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250040018254742.jpg)
某同学先测得摆线长为89.2 cm,,然后用秒表记录了单摆振动30次全振动所用的时间如图甲中秒表所示,则:该单摆的摆长为__________cm,秒表所示读数为______s。
为了提高实验精度,在实验中可改变几次摆长l,测出相应的周期T,从而得出一组对应的l与T的数值,再以l为横坐标T2为纵坐标,将所得数据连成直线如图乙所示,则测得的重力加速度g=________________.
(8分)0.97 cm。单摆的摆长89.68 cm。秒表所示读数为57.0 s。9.86 m/s2。每格2分。
试题分析:游标卡尺的读数分为两部分,一部分是游标尺零刻度线左侧读出主尺上毫米的整数部分即
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004001840437.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004001856681.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004001887928.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250040019031144.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004001918458.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004001949737.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004001965425.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004001996783.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825004002012771.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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