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January 14, 2007

1

找棒状物重心的简单办法

作者: physixfan

分别用两手的食指支持住棒的两端,之后两手同时用力渐渐向中间并拢。这时,你会惊奇的发现,在任意时刻,只有一根手指头相对于棒在滑动,而另一只手指则会相对静止,尽管两只手都在用力。最终,两手靠在一起,这个地方一定就是棒的重心。其道理,主要是静摩擦力以及转轴平衡的知识。

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