滑轮组的动滑轮上有n段绳子,拉力就是总重力的n分之一.
则当总重力为G时,提升力F=G/n.此时可省 (n-1)G/n的力.
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滑轮组的动滑轮上有n段绳子,则当总重力为G时,提升时可省 G的力
滑轮组的动滑轮上有n段绳子,则当总重力为G时,提升时可省 G的力
物理人气:657 ℃时间:2019-08-21 07:49:47
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