SERVING THE QUANTITATIVE FINANCE COMMUNITY

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farmer
Topic Author
Posts: 13462
Joined: December 16th, 2002, 7:09 am

### thanks, curiosity satisified

Thanks for your responses, I have satisfied my curiosity.
Last edited by farmer on August 5th, 2017, 10:29 pm, edited 1 time in total.

outrun
Posts: 4573
Joined: April 29th, 2016, 1:40 pm

### Re: suicide

We can computer the required horizontal velocity, if we know the horizontal distance? What's the distance from the fence to the building?

If it's suicide, thenI guess people would leap and not drop yourself down without any horizontal velocity? If he was hanging and trying to climb down then he wouldn't be able to get a large horizontal velocity is say. Maybe also land feet first? The required horizontal velocity might however not be big, in the first part there is no vertical speed, only horizontal.

Posts: 23951
Joined: September 20th, 2002, 8:30 pm

### Re: suicide

In theory a 35 foot fall takes about 1.5 seconds and that railing doesn't look that far out and the guy's center of gravity might have been already a couple of feet out from the building. It doesn't seem that impossible for a tumbling body to end up a few feet laterally.

Was the guy escaping from a jealous boyfriend or the cops?

farmer
Topic Author
Posts: 13462
Joined: December 16th, 2002, 7:09 am

### tx

.
Last edited by farmer on August 5th, 2017, 10:30 pm, edited 2 times in total.

outrun
Posts: 4573
Joined: April 29th, 2016, 1:40 pm

### Re: suicide

The railing at the left end looks one "door height" out from the building, 7 feet? That would require. 4-5 feet / sec horizontal speed. A firm walking speed.

outrun
Posts: 4573
Joined: April 29th, 2016, 1:40 pm

### Re: suicide

If I was falling I would try to stay on the inside of the fence, it looks difficult to get completely past it, and landing on it looks more hurtful than on the ground.

outrun
Posts: 4573
Joined: April 29th, 2016, 1:40 pm

### Re: suicide

What number is the floor with the entrance to the building? First floor?

farmer
Topic Author
Posts: 13462
Joined: December 16th, 2002, 7:09 am

### .

.
Last edited by farmer on August 5th, 2017, 10:31 pm, edited 1 time in total.

farmer
Topic Author
Posts: 13462
Joined: December 16th, 2002, 7:09 am

### .

.
Last edited by farmer on August 5th, 2017, 10:31 pm, edited 1 time in total.

outrun
Posts: 4573
Joined: April 29th, 2016, 1:40 pm

### Re: suicide

I think Google puts perspective and it is more like window height.
If so then it's close, sound like something difficult to evade

outrun
Posts: 4573
Joined: April 29th, 2016, 1:40 pm

### Re: suicide

Yes first.
He had a chance of survival imo. If I wanted to commit suicide I would make sure I would not end up half dead and suffer even more for many years. I would go higher than the 5th floor.

outrun
Posts: 4573
Joined: April 29th, 2016, 1:40 pm

### Re: suicide

Low chance​ of survival it seems:
https://outdoors.stackexchange.com/ques ... o-be-fatal

tagoma
Posts: 18351
Joined: February 21st, 2010, 12:58 pm

### Re: suicide

Hardly two weeks ago, a pretty similar story unfolded throughout our windows at work. The guy (a 20 something youngster, Mr Everyman) climbed up on the fence of terrace at the second floor of the airport. Policemen and firemen discussed with him a couple of minutes (something along, "don't jump off, everything will be fine"), then the guy started to climb down on the void side (scared to fall off so high (?)), but messed up, entangled phone wires and finally fall down several meters lower on a railing. It looks like he was still alive.

Posts: 23951
Joined: September 20th, 2002, 8:30 pm

### Re: suicide

The center of gravity on "6 foot 220 pound dude" is pretty high up especially if he has broad shoulders.  If he's standing outside the railing leaning out like he's climbing down to the lower balcony, then his upper body could easily be at arms-length (as much as 3-feet) from the top of the rail.

Next, consider the forces on a 220 guy who's leaning out: he's pulling hard on the rail to keep from rotating out into space and he's got his legs at an angle against the corner of the balcony floor.  Between the counterforces from his pulling plus his weight plus the angle of his legs against the edge of the balcony, there could be 200 pounds of lateral force acting to push him away from the building (it depends on the exact angles and the grip of his shoes).  If his feet slipped, then he'd drop straight down perhaps even skidding down the front of the building.  But if he loses his grip, then the lateral forces on his feet will push him away from the building AND the natural rotation of the body about the lower pivot point against balcony edge would send his center of gravity out away from the building.  The lateral forces and pivot effect would probably send the body about 2 feet out in the first 3 feet of the fall (which would take about 0.4 seconds) which gives a lateral velocity of about 5 feet per second which means his body CG might land as much as 9 or 10 feet from the building.   Of course, if the guy freaks out when loses his grip and his legs jerk then he could push further out an land further out.

It still could be suicide but the physics of that kind of geometry and fall certainly have the body moving away from the building.

tagoma
Posts: 18351
Joined: February 21st, 2010, 12:58 pm

### Re: thanks, curiosity satisified

For those who are late to the party, it's kinda Jeopardy game.

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