试题与答案

如图D-10所示,有一重物重量G为98000N,用二根等长钢丝绳起吊,提升重物的绳子

题型:问答题 简答题

题目:

如图D-10所示,有一重物重量G为98000N,用二根等长钢丝绳起吊,提升重物的绳子与垂直线间的夹角α为30°,求每根绳上的拉力S多大?

答案:

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