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]
Two cars collide head-on on a lgmdq 9+ez*dom o::-smevwmsg0 d,cb5gq7 e;9kw el friction-free road. The collision was completely inelastic and both cars quickly came to rest during the collision. What is true about tk 9ed;0wgb5q, m gscw7he velocity of this system's center of mass?
A. It was always zero.
B. It was never zero.
C. It was not zero, but ended up zero.
D. none of the above
参考答案: A
本题详细解析:
暂无
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