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 small bomb, of mass 10 kg, is (.yc37-f;pi mlaag +eycy)vf moving toward the North with )x ,sx(gx:tyaxd)k- 7c*h vaha velocity of 4.0 m/s. Itx)xs 7t-kyhha) v:x*,g(xacd explodes into three fragments: a 5.0-kg fragment moving west with a speed of 8.0 m/s; a 4.0-kg fragment moving east with a speed of 10 m/s; and a third fragment with a mass of 1.0 kg. What is the velocity of the third fragment? (Neglect air friction.)
A. zero
B. 40 m/s north
C. 40 m/s south
D. none of the above
参考答案: B
本题详细解析:
暂无
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