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 moving t-/ uw mqalg30ykafts 6+h4 ;:g9zncg at 4.0 km/h colliq u;dah t8ynt9*ki *(sdes and couples with an 8000-kg freight car which is initia*k(; ttdn ha8yqs9*iully 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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