在“研究匀变速直线运动”的实验中,如图为实验得到的一条纸带,

在“研究匀变速直线运动”的实验中,如图为实验得到的一条纸带,纸带上每相邻的两计数点间的时间间隔均为T,测得AB两点间的距离为L1BD两点间的距离为L2,则物体的加速度大小为a=              

答案

答案:

解析:            

将①代入②可得:  

    将③式代入,解出

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