The issue has never been a simple matter of kinetic energy; it’s the simple matter of energy plus the mechanism for crushing. “Newton’s Bit” [typo corrected 11/4] (who does not reveal his identity) explains it all, rightly eschewing the pancake collapse (which has been rejected even by official myth-makers), and says it was the impact with the ground which crushed all that concrete.
This is lunacy! Pat Curley…. no wonder you couldn’t hack college physics.