問(wèn)題補(bǔ)充: 單選題 汽車(chē)發(fā)動(dòng)機(jī)的額定功率為60kW,汽車(chē)質(zhì)量為5t,當(dāng)汽車(chē)在水平路面上行駛時(shí),設(shè)阻力是車(chē)重的0.1倍,若汽車(chē)從靜止開(kāi)始保持以1m/s2的加速度作勻加速直線運(yùn)動(dòng),這一過(guò)程能維持多長(zhǎng)時(shí)間?
A.3s
B.6s
C.9s
D.12s
答案:B
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