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 国际高中通用物理

[单选题]
A lever is 5.0 m long. The distance freqk,/: v2xnv uom the fulcrum r*gldn;/ cv 8bxszin/ 6e fp0cv) ;.qhto the weight to be lifted is 1.0 m. If a 3000 N rock is to be lifted, how much force musvhibdc*8 g ; lsp.) rzq0/;nx6cvf e/nt be exerted on 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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