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 steel lift column in a service station is 4.0 m long an0mc: 4s,dqdzoy/r3 nav) z;eniyx56xd 0.z,wqo0eavh8y2osb a.s9 .8 s-ry+mka20 m in diameter. Young's modulus for steel . eqm 8krs-.b9aw 28,yhzs v+aas0o oyis $20 \times 10^{10} \; N/m^2$. By how much does the column shrink when a 5000-kg truck is on it?
A. $8.0 \times 10^{-7} \; m$
B. $3.2 \times 10^{-6} \; m$
C. $7.8 \times 10^{-6} \; m$
D. $3.1 \times 10^{-5} \; m$
参考答案: D
本题详细解析:
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