- 问题详情:(2018·威海)图为吊装工具示意图,物体M为重5000N的配重,杠杆AB的支点为O,OA∶OB=1∶2,每个滑轮重100N。当重为700N的工人用300N的力竖直向下匀速拉动绳子时,工人对地面的压力为N,物体M对地面的压力为N。(杠杆与绳的自重、滑轮组摩擦均不计) 【回答】4004500知识...
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