题目内容
某同学在做“测定匀变速直线运动的加速度”实验时打出的纸带如图5所示,每两点之间还有四点没有画出来,图中上面的数字为相邻两点间的距离,打点计时器的电源频率为50Hz(答案保留三位有效数字)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500265215114576.png)
① 打4号计数点时纸带的速度v4 = 。
② 0—6点间的加速度大小为a = 。
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/2014082500265215114576.png)
① 打4号计数点时纸带的速度v4 = 。
② 0—6点间的加速度大小为a = 。
① 1.20m/s ② 1.98m/s2
试题分析:据题意,由于每两个计数点之间省略4个点,则相邻计数点之间时间间隔为
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002652167471.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250026521821345.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002652198840.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002652214821.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002652229843.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825002652245670.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250026522601205.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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