According NIST the constant acceleration of the roofline is 32.196 feet/s² or 9.814 m/s² between time 1.75 and 4 seconds when the roofline velocity increases from 11.57 to 84.01 feet/s or 3.52 to 25.61 m/s! This acceleration is equivalent to gravity acceleration = 100% free fall drop. The average speed during this time is 14.56 m/s and the total free fall displacement is 32.77 meters....
A free falling part C does not apply any forces or loads on anything (except the air (!) it drops through) until it contacts part A! So how can the upper part C above floor 14 damage the lower part below floor 14 as suggested by NIST during these 2.25 seconds? What kind of structural analysis is done ... when no loads except air resistance are applied?
Furthermore - NIST suggests that the upper part C deforms itself during these 2.25 seconds ... when no forces (except air resistance) at all are applied to it (all masses of the upper part are in free fall drop!). Same question ... how can a free fall dropping upper part C deform?
NIST has been asked these questions ... and could not reply!
Citazione:
Buckaroo ha scritto:
Ebbene, il NIST non ha saputo spiegare questi 2,25 secondi di caduta libera. Un parere: questo cosa starebbe a significare?
This makes controlled demolition the OFFICIAL position of NIST.