In the 9/11 discussions, “free fall acceleration” is often treated as a kind of speed limit for gravity-driven falling objects. But that’s a misconception. Watch this short video:
Source: https://youtube.com/watch?v=n8WxkqMRgS4
Because the ladder on the left impacts a table, it is no longer in free fall, and therefore mechanical effects can then cause acceleration or deceleration.
Nothing about the WTC collapses was free fall (excepting the parts ejected to the side that fell through clear air ... Read even more
