本题目来源于试卷: Physics Unit7: Linear Momentum，类别为 通用国际物理
[单选题]
A fire hose is turned oql/ c-1ky(jcon the -fq .ty1pyrz/7 sz8 wudoor of a burning building in order to knock the door down. This requires a force of 1000 N. If the hose delivers 40 kg -/. 1 ytzsyr7pfzquw8per second, what is the minimum velocity of the stream needed, assuming the water doesn't bounce back?
A. 15 m/s
B. 20 m/s
C. 25 m/s
D. 30 m/s
参考答案: C
本题详细解析:
暂无
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