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动量定理

> A 、B两球质量相等，A 球竖直上抛，B 球平抛，两球在运动中空气阻力不计，则下述说法中正确的是（　） A、相同时间内，动量的变化大小相等，方向相同 B、相同时间内，动量的变化大小相等，方向不同 C、动量的变化率大小相等，方向相同　 D、动量的变化率大小相等，方向不同

问题：

发布时间：2020-03-13

A 、B两球质量相等，A 球竖直上抛，B 球平抛，两球在运动中空气阻力不计，则下述说法中正确的是（　）
A、相同时间内，动量的变化大小相等，方向相同
B、相同时间内，动量的变化大小相等，方向不同
C、动量的变化率大小相等，方向相同　
D、动量的变化率大小相等，方向不同

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