关于力矩的问题,很疑惑!图为一个锻炼身体用的哑铃的示意图,现用一根结实的长绳在哑铃中部握手处紧紧地缠绕上若干圈,随后将哑铃置于粗糙的水平水泥地面上,现按图a、b、c中所示的三个
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![关于力矩的问题,很疑惑!图为一个锻炼身体用的哑铃的示意图,现用一根结实的长绳在哑铃中部握手处紧紧地缠绕上若干圈,随后将哑铃置于粗糙的水平水泥地面上,现按图a、b、c中所示的三个](/uploads/image/z/13576569-33-9.jpg?t=%E5%85%B3%E4%BA%8E%E5%8A%9B%E7%9F%A9%E7%9A%84%E9%97%AE%E9%A2%98%2C%E5%BE%88%E7%96%91%E6%83%91%21%E5%9B%BE%E4%B8%BA%E4%B8%80%E4%B8%AA%E9%94%BB%E7%82%BC%E8%BA%AB%E4%BD%93%E7%94%A8%E7%9A%84%E5%93%91%E9%93%83%E7%9A%84%E7%A4%BA%E6%84%8F%E5%9B%BE%2C%E7%8E%B0%E7%94%A8%E4%B8%80%E6%A0%B9%E7%BB%93%E5%AE%9E%E7%9A%84%E9%95%BF%E7%BB%B3%E5%9C%A8%E5%93%91%E9%93%83%E4%B8%AD%E9%83%A8%E6%8F%A1%E6%89%8B%E5%A4%84%E7%B4%A7%E7%B4%A7%E5%9C%B0%E7%BC%A0%E7%BB%95%E4%B8%8A%E8%8B%A5%E5%B9%B2%E5%9C%88%2C%E9%9A%8F%E5%90%8E%E5%B0%86%E5%93%91%E9%93%83%E7%BD%AE%E4%BA%8E%E7%B2%97%E7%B3%99%E7%9A%84%E6%B0%B4%E5%B9%B3%E6%B0%B4%E6%B3%A5%E5%9C%B0%E9%9D%A2%E4%B8%8A%2C%E7%8E%B0%E6%8C%89%E5%9B%BEa%E3%80%81b%E3%80%81c%E4%B8%AD%E6%89%80%E7%A4%BA%E7%9A%84%E4%B8%89%E4%B8%AA)
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