使用如图(a)所示的装置验证机械能守恒定律,打出一条纸带如图

使用如图(a)所示的装置验证机械能守恒定律,打出一条纸带如图(b)所示。图(b)中O是打出的第一个点迹,ABCDEF……是依次打出的点迹,量出OE间的距离为LDF间的距离为S,已知电火花打点计时器所用的交流电的频率是f上述物理量如果在实验误差允许的范围内满足关系式_________,即验证了重锤下落过程中机械能是守恒的。

答案

fS2=8gL

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