Reply #8: It was a rough estimate I did in my head, but since you asked politely...

[file83]

(unlike the smartass below that said "On what planet?")

If it takes a 500ft building 8sec to fall, then it would follow that a 1000 ft building would take about twice as long (or maybe less since the longer the objects fall, the higher their velocity). From watching the videos it seems (I've seen a wide variety of interpretations on this) to me that the buildings took about 15-18 seconds to fall. I'll assume 18 seconds for this example. It's hard to tell exactly when the "falls" terminate because of all the dust. But anyway, the WTC 1 & 2 were 1368 ft tall.

Tojan cooling tower: 500ft / 8sec = 62.5ft/sec (average speed of fall)
WTC Towers: 1368ft / 18sec = 76ft/sec (average speed of fall)

It makes sense that the WTC towers would have a higher average fall speed because they had longer to pick up velocity. Like I said, it seems to me that they are falling at almost exactly the same rate/time.

If you have different data or reasoning, please share so we can compare notes! :thumbsup: