Physics Unit9: Static Equilibrium, Elasticity and Fracture (id: 7fc81a576)

本题目来源于试卷: Physics Unit9: Static Equilibrium, Elasticity and Fracture，类别为 通用国际物理

[单选题]
A lever is 5.0 m long. The distance from the fulcrum to,,o, ;oo gq99dqdfnl s the weight nwuz1g- ;- b)dvgb-e wto be lifted is 1.0 m. If a 3000 N rock is to be lifted, how much f gezv1d -;wwn-bgb)u -orce must be exerted on the lever?

A. $600N$
B. $750N$
C. $3000N$
D. $12000N$


参考答案:  B


本题详细解析: 暂无

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