本题目来源于试卷: Physics Unit3: Kiematics Motion in Two Dimension & Vectors，类别为 通用国际物理
[单选题]
A fighter plane moving 200 m/s horizontally fires a projectile withe :y.nsqe( y 2xx+dw8evz .m4y speed37z (h:hqndw ka2pyi ,eh1fdoo, 5 0rw 50.0 m/s in a foa i,3 q1 yr,( :hwzpn7f wdkdh0eooh52rward direction $30.0^{\circ}$ below the horizontal. What is the speed of the projectile with respect to a stationary observer on the ground?
A. 245 m/s
B. 250 m/s
C. 268 m/s
D. 293 m/s
参考答案: A
本题详细解析:
暂无
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