如图2-10-4是小球自由下落过程的相片,每两次闪光时间间隔为 s,a、b、

如图2-10-4是小球自由下落过程的相片,每两次闪光时间间隔为 s,a、b、c、d是四个相邻位置.由此实验结果可得知,重力加速度的数值是___________ m/s2.

                                         图2-10-4

答案

9.85

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