在忽略空气阻力的情况下,让轻重不同的两个石块在同一地点从同

 在忽略空气阻力的情况下,让轻重不同的两个石块在同一地点从同一高度自由落下,则以下说法正确的是--------------------------------------------------------------------(       )

A.着地前的任一时刻,两石块具有相同的速度和相同的加速度

B.重的石块落的快,先着地

C.轻的石块落的快,先着地

D.两石块在同一段时间内的平均速度相等

 

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