本题目来源于试卷: Physics Bowl by Topic 2: Kinematics - part I General Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
12.29: A vehicle completes one lap aroc;:8(b; ej(.gv cg-favv( r zgs1gh luund a circular track at an average(a)gdc 2ei/2*ovq z 3secix8q speed of 50 m/s and then completes a second lap at an average spe sioc(z 2q23axiqe/ ev*g d8)ced of $V$. The average speed of the vehicle for the completion of both laps was 80 m/s. What was the average speed $V$ of the second lap?
A. 100 m/s
B. 110 m/s
C. 125 m/s
D. 150 m/s
E. 200 m/s
参考答案: E
本题详细解析:
暂无
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