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toat in a burtle 29 сен. 2016 г. в 13:47
Scientific Curiosity
One of my friends in lower sixth form said that the rotation of the Earth should be affecting our travel times. I was really confused, but now I'm actually curious. Does its rotation affect how long it takes us to get to or from somewhere, depending which way we're going?
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Сообщения 31–45 из 229
76561198117027862 29 сен. 2016 г. в 15:29 
Автор сообщения: The Rock God
Автор сообщения: Agni

I already explained that the gravity of the planet pulls everything along.

Are you implying that a vehicle exerts gravitational force capable of pulling a fly or a bird or whatever it may be along with it?

Gravity is irrelevant to what's happening. The bird/fly/helicopter is flying in AIR. The air is moving. The air inside of a plane is moving at the same speed as the plane. Air at ground level that's not inside a moving (relative to the Earth) object is moving at 1000 mph (depending on latitude).

Gravity is never irrelevant. And the air moving does not affect it much due to the low density. If it were a fluid, then that would change.
#31
Bob 29 сен. 2016 г. в 15:31 
Which is stronger: The Coriolis effect or horizontal gravity?
#32
76561198117027862 29 сен. 2016 г. в 15:34 
Автор сообщения: Bob
Which is stronger: The Coriolis effect or horizontal gravity?

That depends.
#33
76561198117027862 29 сен. 2016 г. в 15:48 
Автор сообщения: The Rock God
Автор сообщения: Agni

Gravity is never irrelevant. And the air moving does not affect it much due to the low density. If it were a fluid, then that would change.

First, air IS a fluid.

Secondly, it IS dense enough to move objects. If it weren't planes would have to be capable of incredible speeds to go anywhere heading Eastwards (and could get places really fast by heading West). When you release a balloon it will fly straight up (unless there is a wind relative to the ground). It does not suddenly fly to the West. The air it's in keeps it in the same vertical from the ground.

Yes, air is a fluid. You can use liquid instead for accuracy.

It isn't that dense even though it certainly has density. If it was, we would be swimming in it like in water.

And a balloon only flies if the gas it contains weighs less than air. And it is gravity, not the gas inside the balloon or the atmosphere of earth that keeps it vertical.
#34
Sticky Honeybuns 29 сен. 2016 г. в 15:49 
Agni, I'm not here to make fun of you because your understandings of earth rotation is misunderstood by many people. Go read a physics book please. In the meantime here is one source.

http://www.physlink.com/education/askexperts/ae203.cfm
#35
76561198117027862 29 сен. 2016 г. в 15:54 
Автор сообщения: Sticky Honeybuns
Agni, I'm not here to make fun of you because your understandings of earth rotation is misunderstood by many people. Go read a physics book please. In the meantime here is one source.

{ССЫЛКА УДАЛЕНА}

You are not arguing with me, you are agreeing with me.

Earth exerts a considerable amount of gravitational force. A vehicle does not.

A fly gets pulled along by the planet but not by a car.
Отредактировано Agni; 29 сен. 2016 г. в 15:58
#36
Mr. Shaggnificent 29 сен. 2016 г. в 15:59 
Автор сообщения: Agni
Автор сообщения: Sticky Honeybuns
Agni, I'm not here to make fun of you because your understandings of earth rotation is misunderstood by many people. Go read a physics book please. In the meantime here is one source.

http://www.physlink.com/education/askexperts/ae203.cfm

You are not arguing with me, you are agreeing with me.

Earth exerts a considerable amount of gravitational force. A vehicle does not.

A fly gets pulled along by the planet but not by a car.
You didn't read the link did you?
#37
76561198117027862 29 сен. 2016 г. в 16:01 
Автор сообщения: Mr. Shaggnificent
Автор сообщения: Agni

You are not arguing with me, you are agreeing with me.

Earth exerts a considerable amount of gravitational force. A vehicle does not.

A fly gets pulled along by the planet but not by a car.
You didn't read the link did you?

I did.
#38
Mr. Shaggnificent 29 сен. 2016 г. в 16:03 
https://www.youtube.com/watch?v=DXkmc2p_Zio
#39
Sticky Honeybuns 29 сен. 2016 г. в 16:06 
No, your understanding is flawed and what many people think. Our atmosphere is moving along with the rotation of the earth. Since the earth is our frame of reference is the earth it is considered as a stationary object. We can walk in any direction because of this and we do not have to overcome the rotational direction of the earth. In your example if we tried to walk against earths rotation we would have to overcome that force. Luckily we do not or we could only walk in one direction. Gravity does not exert a horizontal force only a vertical force. Go read up on frames of reference, it should explain what you are having trouble with understanding.
#40
76561198117027862 29 сен. 2016 г. в 16:08 
Автор сообщения: Sticky Honeybuns
No, your understanding is flawed and what many people think. Our atmosphere is moving along with the rotation of the earth. Since the earth is our frame of reference is the earth it is considered as a stationary object. We can walk in any direction because of this and we do not have to overcome the rotational direction of the earth. In your example if we tried to walk against earths rotation we would have to overcome that force. Luckily we do not or we could only walk in one direction. Gravity does not exert a horizontal force only a vertical force. Go read up on frames of reference, it should explain what you are having trouble with understanding.

Actually that is wrong. Because if what you say is correct, centrifuges won't work. And g-forces would not be a thing.

The reason why we don't have to overcome it is simply because we are pulled along with it and in motion.
Отредактировано Agni; 29 сен. 2016 г. в 16:10
#41
Mr. Shaggnificent 29 сен. 2016 г. в 16:10 
Автор сообщения: Agni
Автор сообщения: Sticky Honeybuns
No, your understanding is flawed and what many people think. Our atmosphere is moving along with the rotation of the earth. Since the earth is our frame of reference is the earth it is considered as a stationary object. We can walk in any direction because of this and we do not have to overcome the rotational direction of the earth. In your example if we tried to walk against earths rotation we would have to overcome that force. Luckily we do not or we could only walk in one direction. Gravity does not exert a horizontal force only a vertical force. Go read up on frames of reference, it should explain what you are having trouble with understanding.

Actually that is wrong. Because if what you say is correct, centrifuges won't work. And g-forces would not be a thing.
You make my brain hurt.
#42
76561198117027862 29 сен. 2016 г. в 16:11 
Автор сообщения: Mr. Shaggnificent
Автор сообщения: Agni

Actually that is wrong. Because if what you say is correct, centrifuges won't work. And g-forces would not be a thing.
You make my brain hurt.
I can simplify it for you if you want. Just say what needs to be explained.
#43
Sticky Honeybuns 29 сен. 2016 г. в 16:12 
You guys have fun with this one, I'm out.
#44
Mr. Shaggnificent 29 сен. 2016 г. в 16:12 
Автор сообщения: Agni
Автор сообщения: Mr. Shaggnificent
You make my brain hurt.
I can simplify it for you if you want. Just say what needs to be explained.
OK then, explain how centerfuges and G force work.
#45
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