在没有配备打点计时器的学校里老师想到了用如图所示的装置来验证小球�动过程机械能守恒.用一根长细的线一端系一质量为m的小球.另一端缠绕后固定 Template




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tomski在没有配备打点计时器的学校里老师想到了用如图所示的装置来验证小球�动过程机械能守恒.用一根长细的线一端系一质量为m的小球.另一端缠绕后固定 coloring