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 around a ci,e,im xqx fkfw8zk3ptyhm-6 ;1 q s50vd ie,)we1 (hu 0: o6veppoirvq,v0g+wrcular track at an average speed of 50 m/s and then completes a seco6ow v rveg)0hvop:id w+0,(,e epuqi1nd lap at an average speed 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
| 
