本题目来源于试卷: Physics Unit5: Circular Motion & Gravitation，类别为 通用国际物理
[单选题]
A car goes around a curve of radius r at a constant speed v. Then it m7oof7 (3h ..xj3xl h)or7ye;mvef aqgoes arounoe7(vh.m3rojx exf yhl 7a.f3o m7)q;-1b;pc* idxqs-tr (x4isq5o gd the same curve at half of the original speed. What is the centripetal force on the car as it goes around thes( 4soq1crxdi;i- qt-xg5*b p curve for the second time, compared to the first time?
A. twice as big
B. four times as big
C. half as big
D. one-fourth as big
参考答案: D
本题详细解析:
暂无
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