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Stephen St Bernard

PostPosted: Fri Jul 20, 2012 4:29 pm
by Scaley
Anyone seen the footage of this guy catching the little girl who fell from an air conditioning unit on the third storey of her building in Coney Island? Well done mate!

Re: Stephen St Bernard

PostPosted: Sat Jul 21, 2012 5:17 am
by 4nik8
"The girl fell about 25 feet, which took about 1.25 seconds. The man stopped her fall in about 3 or 4 feet, which took about 0.1 second, depending on the stopping distance and how he supported her. So, she accumulated downward momentum over about 1.25 seconds and gave that momentum to the man (and ground) in about 0.1 seconds...
For Bernard to bring the girl's body to a stop in one-twelfth of the time she spent accelerating toward him — that's 0.1 seconds of stopping time, compared to 1.25 seconds of falling time — he had to exert an upward force 12 times greater than her (downward) weight. (Pushing upward is how you slow a falling body to a stop.) That means, "If she weighs 50 pounds, the man and ground must push up with an average of

12 times that force, or 600 pounds."

Re: Stephen St Bernard

PostPosted: Sat Jul 21, 2012 8:37 am
by Scaley
I'm even more impressed now!