半徑r,厚度一定,組織均勻的圓形木板,若踞去半徑r/2的內切圓後,其質心將移動若干?
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半徑r,厚度一定,組織均勻的圓形木板,若踞去半徑r/2的內切圓後,其質心將移動若干?
Posted in 重心與質心.
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By admin – 2010 年 09 月 28 日
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