Collision and momentum conservation (id: da760f00d)

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]
97.14: A 5000-kg freight car movinv4f, p7y+mgmajpy1 9qg ath1 (fw4rv2ov n 4.0 km/h collides and couples with an 8000-kg freight car which is initi(2r1on fh w4vvally at rest. The approximate common final speed of these two cars is

A. 1.0 km/h
B. 1.3 km/h
C. 1.5 km/h
D. 2.5 km/h
E. 4.0 km/h


参考答案:  C


本题详细解析: 暂无

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