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动量定理

> 把一支枪水平固定在小车上，小车放在光滑水平地上，枪射出一颗子弹时，关于枪、弹、车，下列说法正确的是（） A．枪和弹组成的系统动量守恒 B．枪和车组成的系统动量守恒 C．因为枪、弹和枪筒之间的摩擦力很小，可以忽略不计，故三者组成的系统动量近似守恒 D．三者组成的系统动量守恒

问题：

发布时间：2024-09-10

把一支枪水平固定在小车上，小车放在光滑水平地上，枪射出一颗子弹时，关于枪、弹、车，下列说法正确的是（）

A．枪和弹组成的系统动量守恒

B．枪和车组成的系统动量守恒

C．因为枪、弹和枪筒之间的摩擦力很小，可以忽略不计，故三者组成的系统动量近似守恒

D．三者组成的系统动量守恒

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