Physics Bowl by Topic 2: Kinematics - part I General Motion (id: 36ce773c0)

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]
09.17: A toy car movef3q i9hkaslm1y4 nwh)sp1t3p ( 3g o:asm 4a 7e0vhl7au $3.0\;m$ to the North in 1 second. The car then moves at $9.0\;m/s$ due South for 2 seconds. What is the average speed of the car for this three second trip?

A. 4.0 m/s
B. 5.0 m/s
C. 6.0 m/s
D. 7.0 m/s
E. 12.0 m/s


参考答案:  D


本题详细解析: 暂无

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