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冲量

> 把一个乒乓球竖直向上抛出，若空气阻力大小不变，则乒乓球上升到最高点和从最高点返回到抛出点的过程相比较 [ ] A．重力在上升过程的冲量大 B．合外力在上升过程的冲量大 C．重力的冲量在两个过程中的方向相反 D．空气阻力的冲量在两个过程中的方向相反

问题：

发布时间：2020-03-13

把一个乒乓球竖直向上抛出，若空气阻力大小不变，则乒乓球上升到最高点和从最高点返回到抛出点的过程相比较
[ ]
A．重力在上升过程的冲量大
B．合外力在上升过程的冲量大
C．重力的冲量在两个过程中的方向相反
D．空气阻力的冲量在两个过程中的方向相反

参考答案：

提问用户：ED***yLi

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