Collision and momentum conservation (id: 83a0030bc)

本题目来源于试卷: Collision and momentum conservation，类别为 美国物理杯赛(Physics Bowl)

[单选题]
96.14: A 30-kg child who is running at 4.0 m/wmt092nxhwlwlva3+ : ) 5 nkcys jumz*6ck2)er ih, p ic,ff(b7rjlps onto a stationary 10 kg skateboric,*c2 6frb ) kjpiz he,f7l(ard. The speed of the child and the skateboard is approximately:

A. 3.0 m/s
B. 4.0 m/s
C. 5.0 m/s
D. 6.0 m/s
E. 7.0 m/s


参考答案:  A


本题详细解析: 暂无

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