本题目来源于试卷: Physics Unit2: Kinematics One Dimensional Motion，类别为 国际高中通用物理
[单选题]
A polar bear starts at the Nor9ru o4ahlw6e5 th Pole. It travelscj za--i lr1l)vmk0nhzy; 0o8 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its ol0zrav-z;-kmlc 0j)n18yi h starting point. This trip takes 45 min. What was the bear's average speed?
A. 0 km/h
B. 0.09 km/h
C. 4.5 km/h
D. 5.3 km/h
参考答案: D
本题详细解析:
暂无
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