Ceejay Writer
Stuff I've Googled today:
* What are parts of bolo ties called
* Weirdest part of the brain
* Speed of falling elevator
* Pickled plums recipe
* Popular pickup truck in 1987
* What does FBI do with found bodies
WhenIDieClearMyBrowserHistory
Alanna
interested in the speed of a falling elevator answer.
Stereo Nacht
A good elevator won't fall, so speed = 0. They have breaks that activate automatically if something fails. Now, if the breaks fall too, then its speed will depend on how long it falls, since its acceleration will be 1g (minus the energy lost over friction).
Tillie
Is there a google search history?
Tillie
Oh there is. :-P Welcome to My Activity
Ceejay Writer
Stereo Nacht - I'll assume this is a bad elevator. Awful. Possibly evil.
Ceejay Writer
Tillie, there's a BROWSER search history. Not sure about a Google one, but I'd be darn surprised if there wasn't. That's something they could monetize.
Ceejay Writer
Ah, and yep, there it is. Of zero use to me, but the Googlites love it, betcha.
Ceejay Writer
And the elevator is falling thirteen floors, of course.
Ceejay Writer
I found not-much helpfullness on my falling elevator out there. I'm mostly interested in having it arrive VERY abruptly at ground level, and the door slide open.
Stereo Nacht
From how high does it fall? And if it happens on Earth (or alternate universe of, or planet similar enough), then you calculate from its acceleration (10m per second squared), so in 1 second, it goes through roughly 5 meters, and acquires a speed of 10 m/s; in two seconds, its speed reaches about 20 m/s, and has travelled 20 meters.
Stereo Nacht
Stereo Nacht
Now, that would be a frictionless elevator. If your elevator bounces into its cage, there will be friction, which will reduce the acceleration So instead of using 9.8 m/s^2, you could use a value of 9 or 8.
Stereo Nacht
Now, if there is a passenger in the elevator, and you expect them to survive the fall, you also have to consider the deceleration at ground level. If it hits the floor instantly, you get (theoretically) infinite deceleration. But if you spread the deceleration over a tenth of a second (there are some springs at the bottom of the well);
Stereo Nacht
or a second ore two (the breaks finally work), you can calculate the deceleration. Now, since it's going to be negative Gs, downward, that means the blood from the feet and upward will rush to the head of the passenger (unless they were smart enough to "lie" horizontally. Then you can go up to 4gs for an average person. Beyond that, they are knocked out.
Stereo Nacht
(And probably suffered a few broken bones, too, if not internal bleeding.)
Stereo Nacht
Oh, I forgot! Since friction increases with speed, your elevator will reach a maximum (terminal?) speed. Oh! Hey! This will help you!
Free Fall Calculator
Stereo Nacht
And even better: one with air resistance:
Free Fall with Air Resistance Calculator
; you could just increase that resistance to take into account the friction of the cabin on the cage (or failing breaks, maybe). Have fun!
Alanna
Stereo Nacht : Earlier this week I was in an elevator (that did not fall) wondering if I should lie down if it started to fall. Thanks for confirming! Also, does it matter how old the elevator is? What if it's from the 1930s?
Alanna
I don't mean a present day elevator that was made in the 30s, because I assume that's been upgraded. Did 1930s elevators have the same type of brakes?
Stereo Nacht
Alanna : I would assume such an old elevator would have been upgraded over time; elevators need regular maintenance exactly to minimize the risks of failure, catastrophic or not.
Stereo Nacht
This is a bit dumbed down, but it explains quickly the main security features of an elevator: https://askinglot.com/...
Stereo Nacht
Now, I assume Ms. Writer is talking of an elevator that would almost have a mind of its own (knowing her writing), so I assume it could just slack all safeties, or overspin the pulleys, resulting in something like a free-fall.
Ceejay Writer
13 Floors. One human passenger. Earth. I'd prefer if she died horribly.
Ceejay Writer
Overspinning pullies sounds marvelous!
Ceejay Writer
If it helps, I'm assuming some level of personal 'luck' exists, and she's been pushing her luck lately.
Stereo Nacht
She'll be dead for sure! If still standing, she will have her legs broken, and her brain would probably split once it hits the ground. If you want something very graphic, it could split while hitting the rail of the cabin (if there is one; otherwise, just the wall), and have her brain "paint" it from the impact down.
Stereo Nacht
Very fast, but very messy death.
Corgi
PHYSICS!
Ceejay Writer
Stereo, that's delightful! A messy death that would be a shocker for those that had been waiting for the car to arrive in the lobby would be just sublime.
Ceejay Writer
Corgi..... you sound excited. Have something to add?
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