2-dim collision (id: a36e5cc22)

本题目来源于试卷: 2-dim collision，类别为 美国物理杯赛(Physics Bowl)

[单选题]
13.42: An object of mass 12M is at rja loyol92 2jgscojm 9j00,1yest when it sudde0d kaed( *+9vey3hcws nly explodes into 3 pieces with masses 3M, 4M and 5M. The piece of mass 3M moves with speed V in the directiosv3 wc*hy+ed09kade (n shown in the diagram. What is the speed of the piece with mass 5M knowing that it is moving directly to the right?

A. $V$
B. $\frac{3\sqrt{2}}{20}v$
C. $\frac{3\sqrt{2}}{5}v$
D. $\frac{3}{5\sqrt{2}}v$
E. $\frac{7}{5\sqrt{2}}v$


参考答案:  C


本题详细解析: 暂无

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