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

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)

 

    ①打第4个计数点时纸带的速度v4 =                    m/s。

   

②0—6点间的加速度为a=                   m/s2

 

答案

1.20   1.98-2.02都可

解析:略

 

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