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> 在光滑水平面上有甲、乙两车，两车质量之比m 甲：m 乙=2：1．在两车之间有一根弹簧被压缩（不连接）后静止，同时释放两车，当弹簧恢复原长把两车弹开后，甲车与乙车（　　） A．速度大小之比为1：2 B．动量大小之比为1：2 C．动能大小之比为1：2 D．以上结果都不对

问题：

发布时间：2024-09-09

在光滑水平面上有甲、乙两车，两车质量之比m _甲：m _乙=2：1．在两车之间有一根弹簧被压缩（不连接）后静止，同时释放两车，当弹簧恢复原长把两车弹开后，甲车与乙车（　　）

A．速度大小之比为1：2 B．动量大小之比为1：2

C．动能大小之比为1：2 D．以上结果都不对

参考答案：

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