If the world stopped turning...

If the world stopped turning...

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Discussion

Zad

12,721 posts

238 months

Wednesday 8th February 2012
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Basically, when any question starts off with a premise that is physically impossible, all bets are off. You cannot use physics to explain a premise which itself is explicitly out of it's realm.

I seem to vaguely doing the calculation at school, the resulting force is the order of 1/300th that of gravity.

hairykrishna

13,230 posts

205 months

Saturday 11th February 2012
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R300will said:
Bedazzled said:
R300will said:
There is no such thing as centrifugal force
but wait...

R300will said:
there is such a thing as reactive centrifugal force
semantics, not physics tongue out
Its complicated but in essence it is a fictitious force and therefore it does not exist and depending on what frame you are viewing the object moving in a circular path you will observe different effects that can be labelled as centrifugal such as the intertial force or the reactive force.

R300will

3,799 posts

153 months

Saturday 11th February 2012
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Love that ^^^

SirBlade

544 posts

194 months

Saturday 11th February 2012
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If all of the earth stopped rotating, as pointed out earlier, a day would last a year.

Which means half the planet would be in perpetual sunlight, while the other half would be in pitch black.

This would also cause a heating imbalance, which would result in super storms along the midway.

How cold would the unlit side become? Who knows, possibly -150C.

MilnerR

8,273 posts

260 months

Monday 13th February 2012
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SirBlade said:
If all of the earth stopped rotating, as pointed out earlier, a day would last a year.

Which means half the planet would be in perpetual sunlight, while the other half would be in pitch black.

This would also cause a heating imbalance, which would result in super storms along the midway.

How cold would the unlit side become? Who knows, possibly -150C.
Similar to living in Sweden then.

Tim330

1,138 posts

214 months

Monday 13th February 2012
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http://www.esri.com/news/arcuser/0610/nospin.html

Some folks would need to learn how to swim or live in a boat

uktrailmonster

4,827 posts

202 months

Tuesday 14th February 2012
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Simpo Two said:
That's funny, roundabouts always tried to push me off the outside... so there is a force more powerful than centripetal. Always thought it was centrifugal - as in centrifuge, throwing stuff to the outside...
The outward force you 'feel' is just the equal and opposite reaction to the force (centripetal force) that must be applied toward the centre of the roundabout to allow you to stay on it in the first place. If you suddenly remove the centripetal force by letting go then you simply fly off the roundabout at a tangent as there is now no force pushing you toward the centre. The confusion comes from when people incorrectly describe the outward reaction as the centrifugal force.

davepoth

29,395 posts

201 months

Tuesday 14th February 2012
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Tim330 said:
http://www.esri.com/news/arcuser/0610/nospin.html

Some folks would need to learn how to swim or live in a boat
Excellent work there. However he didn't model what would happen due to the differential heating/cooling caused by the earth stopping. The massive heat differential would likely cause some extreme wind conditions.

Daniel1

2,931 posts

200 months

Tuesday 14th February 2012
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SirBlade said:
If all of the earth stopped rotating, as pointed out earlier, a day would last a year.

Which means half the planet would be in perpetual sunlight, while the other half would be in pitch black.

This would also cause a heating imbalance, which would result in super storms along the midway.

How cold would the unlit side become? Who knows, possibly -150C.
I'm not so sure, studies of hot Jupiter exo planets, that are tidally locked, tend to have a uniform temperature. They are balanced by the winds carrying heat from one side to another. Winds unto 6000 mph.

Source: universe documentary program on discovery hehe



wolves_wanderer

12,423 posts

239 months

Saturday 18th February 2012
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There was a documentary (still available on Sky Player) called When The Earth Stopped Spinning. Fascinating and scary.

jebus

278 posts

177 months

Sunday 19th February 2012
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There was a documentary on the core stopping rotating, was ace I love low budget, disaster movies lol