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 the wvv7gf9v6a)y eb 9 kz.o)ws sp*eight to be li1 /nb tgt*dt2wfted is 1.0 m. If a 3000 N rock is to be lifted, how much force must be exerted own2*bt1 ttd/g n the lever?

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


参考答案:  B


本题详细解析: 暂无

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