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> 不定项选择在空中相同高度处以相同速率分别抛出质量相同的三个小球，一个竖直上抛，一个竖直下抛，一个平抛，若不计空气阻力，从三个小球抛出到落地的过程中（） A．三个球动量的变化量相同 B．下抛球和平抛球动量变化量相同 C．上抛球动量变化量最大 D．三个球落地时的动量相同

问题：

发布时间：2024-09-13

不定项选择在空中相同高度处以相同速率分别抛出质量相同的三个小球，一个竖直上抛，一个竖直下抛，一个平抛，若不计空气阻力，从三个小球抛出到落地的过程中（） A．三个球动量的变化量相同
B．下抛球和平抛球动量变化量相同
C．上抛球动量变化量最大
D．三个球落地时的动量相同

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