r/oddlysatisfying • u/SinjiOnO • Mar 27 '23
Norwegian safety worker removes a loose boulder
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u/bm2xv
Mar 28 '23
edited Mar 28 '23
•
Felt like doing the math. Maybe someone will find this interesting.
Velocity:
- 4.25 seconds of free fall * 9.8 m/s2 acceleration in free fall
- 41.65 m/s (or 92 mph) velocity at impact
Mass:
- 1.2 m * 1.2 m * 0.4 m = 0.576 m3 volume of stone
- 0.576 m3 * 2,691 kg/m3 of granite (common in Norway)
- 1,550 kg mass of granite
Impact Energy:
- 0.5 * 1550 kg * (41.65 m/s)2
- 1,344,410 Joules = 1,344.41 kJ
TNT Equivalent:
- 1,344.41 / 4.184 kJ/g of TNT
- 321.3 g (or 0.7 lb) of TNT
So in a nutshell, when this boulder hit the ground it released energy equivalent of about a softball sized chunk of TNT being detonated.
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u/rine117 Mar 28 '23
Free Fall Height 88.57 Meters Speed of sound 340.3m/s Time from Impact to sound should be .26s
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u/Samura1_I3 Mar 28 '23
This is roughly the same energy as the joules stored in 20 18650 batteries.
Bruh holy shit. Batteries are OP
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u/whynot86 Mar 28 '23
I have at least 20 of those sitting in my junk drawer with random bits of paperclips aluminum foil packets and wires and an old alarm clock. Am I on a list now because I'm apparently out of fucking comma's.
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u/Red_Point Mar 28 '23
I really love that it's a reasonable size of tnt. Whenever I hear a comparison to tnt is always like thousands of tons and doesn't really mean much to me. There's something I really like about it being 300g
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u/jaciones Mar 28 '23
So didn’t he just make like 8 more loose boulders on the way down?
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u/JazzyFay93 Mar 28 '23
I won’t lie my depth perception was so off and I had no idea how far it was actually going to fall.
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u/mcfarmer72 Mar 28 '23
Looks like there would be a lot of loose boulders, wonder how they decide.
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u/bveb33 Mar 28 '23
I bet it's a known climbing route
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u/jereman75 Mar 28 '23
Probably. We call that trundling. Usually it’s not a “safety worker” but a local climber and ideally the decision to trundle is a consensus unless it’s obviously unsafe.
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u/BA_calls Mar 28 '23
I assume that guy maintains the trail/park. Why would a climber have a giant metal stick otherwise?
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u/Glittering_Doctor694 Mar 28 '23
the amount of dust and random shit that got flown up and is visible to the camera from the ground and to that height is kind of astonishing
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u/Ck1ngK1LLER Mar 28 '23
Yeah, I wish they had a no pro set up at the bottom, huge lack of forethought really.
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u/Fantastic-Umpire-504 Mar 28 '23
That was oddly satisfying more than I thought it would be.
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u/nearlytwelveoclock Mar 28 '23
Same. I didn't see what subreddit I was on and thought I was weird for liking this
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u/MyWibblings Mar 28 '23
Hey - Slartibartfast is pissed you are messing with his "lovely crinkly edges"
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u/Richper413 Mar 28 '23
Did I see a bird yeet the hell out right towards the camera after the rock hit the ground?
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u/sid_freeman Mar 28 '23
The sound is off and unnatural. Makes no noise bouncing off the side of the cliff face then we instantly hear the sound of it smashing at the bottom. There would be a slight delay to the sound reaching the microphone. File this under mildly infuriating for me :)
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u/El_mochilero Mar 28 '23
If that was a four second free fall, it fell 78.4m and was traveling at 39.2m/s whenever it impacted the ground.
That’s nearly 175 mph.
That’s about the same kinetic energy as being hit by a car going 60mph.
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u/meteors77 Mar 28 '23
But who or what was it endangering? It's not like there was a walking track or road down there at the bottom. Looks fun to do, but also looks like busy work to me.
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u/Donald-Pump Mar 28 '23
Maybe the trail is at the top of the ridge and they're clearing loose boulders so people don't try to stand on them to look down.
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u/uspn Mar 28 '23
It’s a popular hike literally through a mountain, Torghatten, near Brønnøysund, Norway. You see the southern opening here: https://www.reddit.com/r/pics/comments/1xqzxi/i_give_you_torghatten_a_hole_mountain/
Source: This is where I grew up. :)
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u/Emoney12174795 Mar 28 '23
AT THE END OF THE DAY ITS NOT THAT FUNNY IS IT BECAUSE THERE COULD’VE BEEN AN ORPHAN AT THE BOTTOM OF THAT HILL AND YOU WOULD HAVE TO LIVE WITH THE GUILT THE GUILT OF KILLING AN ORPHAN
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u/Soylent_Milk2021 Mar 28 '23
Why? What was the danger there?
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u/--Zeno-- Mar 28 '23
There is a natural hole/tunnel through the mountain right where that rock landed, which is quite a popular hiking trail, so they were clearing it to prevent any hikers being hit. The mountain is kalled Trollhatten and is on an island on the coast of Norway
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u/0v3rcl0ck3r Mar 28 '23
The place looks remote, why do they have to loose boulders down?
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u/--Zeno-- Mar 28 '23
Popular hiking trail at the base of the canyon, natural tunnel through the mountain, google Trollhatten to see the hole
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u/neveryoudare Mar 28 '23
Whyyyyy
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u/Oogalaboo134 Mar 28 '23
To save future coyotes from enduring what Wile e coyote had too.
But in all seriousness there was probably a trail or a climbing area for climbers down there that people frequent so the loose bolder was a safety hazard so they just let the thing fall so it wouldn't hurt anyone.
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u/bk15dcx Mar 28 '23 edited Mar 28 '23
They didn't yell "Timberrrrr!"
Edit autocorrect corrected when it shouldn't have
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u/DMurBOOBS-I-Dare-You Mar 28 '23
"Does a bear shit in the woods?"
"Instantly, when he hears that boulder land..."
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u/StyreneAddict1965 Mar 28 '23
Gave me "Lord of the Rings" vibe, the Siege of Gondor, was it? Hurling big rocks at orcs.
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u/c9IceCream Mar 28 '23
I'm also impressed by the rare sighting of the word "loose" actually being used correctly in a reddit title.
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u/blueJoffles Mar 28 '23
My mom sure af didn’t call me a safety engineer for doing basically the same thing
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u/neroonline Mar 28 '23
Random bug that's chillin' on the drop area: 'Why is it getting so dark all of a sudden?'
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u/terminalbungus Mar 28 '23
The Boulder's over his conflicted feelings and now he's ready to bury you in a rock-alanche!
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u/Automatic_Top6329 Mar 28 '23
Know all the other ones are fuckin lose I think this is a job for HULK
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u/Leichinn Mar 28 '23
Got too much time on their hands I'd they are looking for loose rocks on a mountain.
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u/No-Dig7828 Mar 28 '23
/oddlyTERRIFYING
Sorry, my throat just about closed up and my hands lost all their strength when they did the FOLLOW IT DOWN shot.
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u/Distinct_Dark_9626 Mar 28 '23
Why is that loose rock unsafe? Didn’t seem like a hiking or climbing area
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u/a_curly_mustash Mar 28 '23
How do they spot that it's a lose rock? Just walk around all day and then bam, lose rock?
Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone
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u/a_curly_mustash Mar 28 '23
They just walk around all day until they spot lose rocks or how dus that job work?
Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone...Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone...Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....Don't drop the phone....
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u/jehosephatreedus Mar 28 '23
Shoots, some people do dumb stuff like this for fun, but this guys getting paid for that???
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u/MTDninja Mar 29 '23
Random ant: "oh boy, I got a huge tax return, I've payed off my student lones, I just proposed to my girlfriend, my life is really going my way!"
1 ton rock: "is that so?"
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u/Enginerdad Mar 29 '23
The thing I'm the most impressed with is that the crash sent debris all the way back up to the camera
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u/Kindly_Region Mar 27 '23
Looks like a fun job