本题目来源于试卷: Physics Unit7: Linear Momentum，类别为 国际高中通用物理
[单选题]
A railroad freight car, yrr1fv0ap z1hu2w9( q8h bqa/2 d6g0ncsd(pz mass 15,000 kg, is allowed to coast along a level track at a speed of 2.0 m/s. It collides and couples with a 50,000-kg second car, initially at rest and w0 dp(snd6z2c gith brakes released. What is the speed of the two cars after coupling?
A. 0.46 m/s
B. 0.60 m/s
C. 1.2 m/s
D. 1.8 m/s
参考答案: A
本题详细解析:
暂无
| 
