本题目来源于试卷: Physics Unit7: Linear Momentum，类别为 国际高中通用物理
[单选题]
A fire hose is turned on the door of a burning building in order to kn.o p;+(tyyaykp oit.-w-zn h8 ock tot x9);a61 evqxhl/ d2frzvr u 7)/sklhe door down. This requires a force of 1000 N. If the hose delivers 40 kg per second, what is the minimum velocity of the stream needed, assuming the water doesn'tk;l )t)u dzxvahrev2of / l6rx9/s7q1 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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