YOU SAID:

That means that a hammer, which is quite massive, and a not-so-massive feather that dropped from the same height will hit the ground at the same time.

INTO JAPANESE

これは、非常に重いハンマーと、同じ高さから落ちたそれほど大きくない羽が同時に地面に当たることを意味します。

BACK INTO ENGLISH

This means that a very heavy hammer and a not very large feather falling from the same height will hit the ground at the same time.

INTO JAPANESE

これは、同じ高さから落ちてくる非常に重いハンマーとそれほど大きくない羽根が同時に地面に当たることを意味します。

BACK INTO ENGLISH

This means that a very heavy hammer and a not very large feather falling from the same height will hit the ground at the same time.