slowoldman
Mind you, I don’t know what the deceleration would be if you fell out of an aircraft and hit the ground without a parachute. Even with a helmet on that would have to smart a bit.
It of course rather depends on what you actually fall on!
A “typical” human free falls at around 125mph, for a skydiver in a nice “flat” posture. If you “dive” headfirst at the ground, even at low level (where air density is high) you can reduce your drag and hit over 200mph quite easily.
So, lets take the lower number 125mph which is approx 55 meters per second.
So, if you decelerate to zero speed in the following distances, here are the g forces:
dist time g
[m] [mS] []
200.0 3600 1.57
100.0 1800 3.15
50.00 900 6.29
25.00 450 12.59
12.00 216 26.23
6.00 108 52.46
3.00 54 104.91
2.00 36 157.37
1.00 18 314.73
0.50 9 629.46
0.25 5 1258.93
0.10 2 3147.32
So, fall into a nice tall, soft fir tree, and take over 50m to come to a halt, and there’s a good chance you’ll survive (as has be done on few occasions, most notably an airhostess who fell out of a commercial airliner and landed (alive) in a snow bank/fir tree!!)
But, land on a concrete parking lot, and stop in half your width, say 100cm, and er, you’re gonna need a bucket……..