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 North Pole. It tr ord) t,kkz;ecgxx w /om/l9,/(ko vo/avels 1.0 km south, thk (hdwgv08hfbz3 6n ki/p.bq5br 9uc2en 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takeb wb(5n.fvzkd gh2pr60buq9/k ic 3h8s 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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