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 freight car moves along a frictionless level rair2 bbr7 w;p:t igcvnil+zta52 7m+ 8rplroad track at1 cxtnwz0c0 wf5g1 )tk constant speed. The car is open on top. A large load of coal is suddenly dumped into the car. What happens to thet1zcg0k1xwct f )nw5 0 velocity of the car?
A. It increases.
B. It remains the same.
C. It decreases.
D. cannot be determined from the information given
参考答案: C
本题详细解析:
暂无
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