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(New Zealand Herald)   Gravity is stronger in New Zealand than anywhere else on Earth   ( divider line
    More: Interesting  
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9573 clicks; posted to Main » on 05 Oct 2002 at 12:32 AM (15 years ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»

110 Comments     (+0 »)

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2002-10-05 01:39:41 AM  
So that must mean there are heavy metals underneath... I'd go uranium mining.

Okay, maybe not. But maybe there are some worthwhile heavy metals down there?
2002-10-05 01:41:01 AM  
cool pic andon. what is that?
2002-10-05 01:48:30 AM  
Maybe that's why everything seems heavier here..perhaps.
2002-10-05 01:49:37 AM  
So this is why kiwi's brains pool into their arses?
2002-10-05 01:50:42 AM  
Them's jokes, nothing but...relax
2002-10-05 01:51:32 AM  
Dapper Dan - Yo, dawg. That's M.C. Escher, yo! In tha hizzouse. It's called "Gravity"
2002-10-05 01:57:02 AM  
YoungFart is right. NkThrasher We assume the body to be of uniform density to actually use that equation, so it is quite reliable with large distances between the two objects. With very small or near-zero distances, the equation has to be modified. Furthermore, you have to multiply the two masses in the formula, not add them.
2002-10-05 01:57:39 AM  
That'll pull those Warriors down to Earth.
2002-10-05 01:59:58 AM  
Dapper Dan - If you aren't familiar with him, you can go here and see some of his stuff. It's the site that I snagged the picture from.
I saw one of his huge murals in a post office in The Hague in 1982 and have been a fan of his ever since.
2002-10-05 02:00:15 AM  
Finally, an explination why the balrog can't fly even though it has wings.

2002-10-05 02:11:36 AM  
This explains why they filmed the LotR trilogy there -- Peter Jackson could save on special effects as gravity made everyone hobbit and dwarf size except for the really tall people.

this nonsensical comment brought to you by the MPAA -- proudly supporting brain-rotting entertainment
2002-10-05 02:16:59 AM  

okay, so:

((Mass1 + Mass2) * Gravitational constant) / Distance to the center of mass ^ 2

is the force due to gravity between two masses. well if you're one mass and the earth is the other, than whatever the earth is made out of (and its density ~ mass) between you and the center of the earth is going to determine how strong that force is, right?

rocks within the crust and upper mantle of the earth vary in density. something like talc or gypsum is going to be much less dense than, say, a bunch of lead. so, if the people in new zealand are all standing over a bunch of really dense rocks (like lead), then the force due to gravity is going to be slightly greater than that in some other area of the world (assuming such other area of the world is of rocks with a lower density than lead).

it might surprise some of you to know that gravity surveys are often used to search for buried dense objects or ores. a gravimeter is basically a modified seismometer.
2002-10-05 02:26:50 AM  
Misspudding, please stop thread jacking. I believe the subject is M. C. Hammer. Sheesh !
2002-10-05 02:27:26 AM  
I'll just assume that since about 60 people have posted before me, that the "because it sucks" joke is done.
2002-10-05 02:28:21 AM  
oneahole: this has probably already been said, but they flush the other way down here. [see coriolis effect]
2002-10-05 02:28:34 AM  
oh good grief. that post had a lot of grammar errors in it.

additionally, new zealand is in a very tectonically active area of the world:

[image from too old to be available]

new zealand is located on the boundary between the australian and pacific plates. the australian plate is heading north while the pacific plate is heading west. the pacific plate, which includes much of the south island, is moving relative to the australian plate at a rate of about 40 millimeters each year in a southwest direction. so christchurch is moving away from auckland about 4 meters every century.

that means there's subduction happening on both the north and south islands. and there's a strike-slip fault connecting the two (the alpine fault). it's right-lateral, if i've got the motion between the australian and pacific plates correct.

so anyway...the reason this is making the gravity greater is probably because of subduction. the subducting plates get cooler and denser as they subduct, and which would contribute to the higher gravity values.

i think that's right. yeah.
2002-10-05 02:30:26 AM  
Reactron, finally, a subject that i'm not guilty of thread-jacking!! :) heheheheh...
2002-10-05 02:31:24 AM  
hehe....hey, geology CAN be cool!!!!
go pudding!!!!
2002-10-05 02:35:54 AM  
Don't get me started on the Coriolis effect,
[image from too old to be available]

Back off man, I'm an X-phile.
2002-10-05 02:35:56 AM  
thanks Thewrongbilby!

oh yeah, the gravity could also be greater in the area because subduction causes mountains (i'm not going to go into details). mountains mean bigger, thicker piles of rocks. thicker piles means more mass. but i don't know how much the extra mass would get canceled out by the increased distance from the center of mass.

ok. i'm just rambling now.

new discussion: how great is the gravity where anna nicole smith lives?
2002-10-05 02:54:40 AM  
Misspudding: You multiply the masses, not add them.

Consider two objects, one with a mass of 1kg, the other, 0kg.

If they were added, that would imply that the massless object is affected by gravity.

But when they are multiplied, its all peachy.
2002-10-05 02:59:00 AM  
There's that word "heavy" again. Why is everything so heavy in the future? Is there a problem with the earth's gravitational pull?

God, I love that movie.
2002-10-05 03:02:02 AM  
yeah, Karpage, i just assumed the equation was right and copied and pasted it. i figured it out later but figured i'd already posted too many damn times. :)

me rikey math.
2002-10-05 03:02:04 AM  
This explains why New Zealanders are so dense.

New Zealanders fark animals too, did you know that?

Ha ha ha

2002-10-05 03:05:55 AM  
Arnold lane: But density comes from mass, not weight. but.. but...

ah, fuggit. don't mind me.
2002-10-05 03:09:29 AM your density. I mean, your destiny.

Two for one!

Okay, I'm done now.
2002-10-05 03:12:22 AM  
Dang Misspudding, there sure seems to be an awful lot of subduction going on down there. When do you have time to tend to the sheep ?
2002-10-05 03:14:29 AM  
quick overview on gravity and magnetics for non-believers:


that is, of course, if you're bored. no, not you.
2002-10-05 03:14:52 AM  

Yes I know, mass / volume. I was thinking that the additional gravitational pull would compress New Zealanders, decreasing their volume, not increase their mass.
2002-10-05 03:15:55 AM  
dammit, Reactron! i'm not in NZ, so i'm not tending to the sheep, anyway.

old geology joke: subduction leads to orogeny.

har har har...
2002-10-05 03:17:57 AM  
Hey, wait a minute, Misspudding. If there were all that gravity buried under NZ, how come all your elves don't have ears that point down ? Hmmmm ? 'Splain that one smarty pants !
2002-10-05 03:20:16 AM  

I'm a programmer dammit, not a geologist, but isn't it the other way around --- orogeny leads to subduction? Orogeny is when plates move to form mountains right? Wouldn't that cause subduction (pushing plates down)?
2002-10-05 03:24:30 AM  
Oh my. I'm afraid I've confused you with one of our NZ fark pals. My beanfield is in Michigan too, where the girls are prettier and the force of gravity is relatively low. Small world.
2002-10-05 03:24:37 AM  
arnoldlayne -

subduction: process of one plate running into and going beneath another. the more dense plate (oceanic crust) sinks, the less dense plate (continental crust) is on top.

orogeny: just the general term given to "mountain building".

therefore, the process of subduction generally leads to mountains being built. not the other way around. cool?

reactron -

i don't have any friggin' elves! what do you think i am, an elf pimp?
2002-10-05 03:27:48 AM  
reactron, heh. yes, you seem to have me confused with someone else.

gravity in michigan...lemme think. i just measured it in east lansing a few monhts ago. that was fun. we did a gravity lab in the natural science building on the campus of michigan state. which reminds me, here's a good question for some of you beefy science types:

why do you think gravity values in one area might vary over time?
2002-10-05 03:33:02 AM  
anyone? anyone? bueller?

ok ok. it's because of where the sun and other planetary bodies are over time (but mostly the sun). when the sun is on the other side of the earh it makes your force of gravity to the earth seem greater. when it's on top of you, it has the effect of lessening the force of gravity between you and the earth. just slightly, of course, but hey...

ok. it's been fun sharing science with you guys tonight. nighty night!
2002-10-05 03:33:23 AM  

Ohh I see - orogeny isn't a process like subduction. Cool, I learned something!
2002-10-05 03:57:07 AM  
The study says gravity between Doubtful Sound and Dusky Sound in southwest Fiordland is 150 units above average

wtf!? 150 units of what? That's hardly usefull. Certanly not newtons :P (I don't think gravity in NZ is 159.8 n...)

Damnit people USE SI!
2002-10-05 04:03:57 AM  
did someone mention fisting?
2002-10-05 05:14:17 AM  
No, New Zealand just sucks harder than anywhere else.

2002-10-05 05:25:21 AM  

I do not personally dislike New Zealand or New Zealanders, but as an Australian it is my patriotic duty to ridicule New Zealand at each and every available opportunity.

2002-10-05 07:06:33 AM  
2002-10-05 07:12:23 AM  
on an obverse note, everybody weighs less at high altitude, so new zealanders can just go off and climb K2 if they want to shed some kilos (this may explain the evident over representation of NZ in climbing circles).

irregardless (snicker), weight may change, but mass does not. i think. physics not my strong suit.
2002-10-05 07:29:34 AM  
What did one saggy boobie say to the other saggy boobie?
We better get some support or people will think we're nuts!

~my gravity joke.

(*silence ensues*)
2002-10-05 08:41:55 AM  
Nonononono NO! You people are getting it all WRONG!

Gravity is a phallacy! It does not exist! We are only happy thinking it exists! It is just like Time! Time is an illusion! There is no "universal" time! We all exist on our own, "relative" time span! Time is a force of the universe! And it has curves! And then theres the thing with the wormholes! WE ARE ALL GONNA DIE A HORRIBLE DEATH!

(I need to stop reading that farking "The universe in a nutshell" bookie.)
2002-10-05 09:14:32 AM  
Hmm. I typed "gravity" in the google image search, and look what came up :)

[image from too old to be available]
2002-10-05 10:02:45 AM  
DOOM: are you sure you didn't type "gravity defying" by mistake?
2002-10-05 10:04:00 AM  
so this means white guys in new zealand REALLY can't jump?
2002-10-05 11:42:49 AM  
Just one clarification: The coriolis effect is quite real, and is does go the "other way" in the southern hemisphere, but it is such a small effect that it really has nothing to do with which way water swirls down a drain. It only affects very large systems, like storms.

I'm glad I could get some physics in--other Farkers have already covered the gravity thing quite well.
2002-10-05 11:52:07 AM  
Doom: I gave a Joey Lawrence-like "Whoa" when i saw that.

also...look at that goon's face standing next to them
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