本题目来源于试卷: Physics Unit2: Kinematics One Dimensional Motion,类别为 通用国际物理
[单选题]
A polar bear starts at tsfu *9e 82c+h19c)fr4yr: als qi *cig 2zgtvnh6n5 ern5(svk 6pjuqlvsk an s2 /w4-m9e North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. -2ql kj6srsk65/v9 n4vnn uwse5ma (p What was the bear's average velocity?
A. 0 km/h
B. 0.09 km/h
C. 4.5 km/h
D. 5.3 km/h
参考答案: A
本题详细解析:
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