All Questions
Tagged with earth angular-momentum
59
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Why is Coriolis effect responsible for COUNTER-clockwise rotation in the northern hemisphere?
Based on the form of the force, $F_\text{cor} = - 2m\mathbf{w}\times\mathbf{\dot r},$ I would expect a projected particle to rotate clockwise in the northern hemisphere. This is confirmed by the ...
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Does earth revolution speed slowing down because of small drag from space is not empty?
I read that universe is not empty, in least dense parts has 1000 atoms per cubic meter, does that slow down earth speed?
Why these atoms are there, why they are not attracted by surrounding gravity ...
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88
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Has a heavier atmosphere and the relocation of oil around the Earth had a measurable effect on the rotation of the Earth?
I am wondering if the man-made carbon emissions put in the Earth's atmosphere over the past 100+ years, and also the relocation of oil around the Earth over this same time period, has had any ...
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1
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505
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Are there torques affecting Earth?
Since the time it takes for the earth to complete one rotation about itself (i.e., the time we call "day") is not constant, then the angular speed is also not constant, that is, there is a ...
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950
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Energy needed to stop the Earth's inner core ---and its effects?
As you will most possibly know, a misreading of this paper by the media caused kind of a "panic" about how the Earth's inner core had stopped or even reversed its rotation and its "...
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671
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How exactly does the Moon stabilizes Earth axial tilt?
There are many references regarding the Moon stabilizing the tilt of the Earth's rotational axis. I'd like to see some support for that claim, more than non-sequitur handwaving "Moon causes tides,...
- 1,951
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Will the Earth ever stop rotating?
Will the Earth ever stop rotating or will it rotate for the entire lifetime of the universe (assuming that the Sun didn't exist, so the Earth would survive to the Red Giant phase)?
- 2,462
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Does the earth’s rotational angular velocity change?
This is what is written in The Feynman Lectures on Physics, Vol. 1 (ch.5)
We now believe that, for various reasons, some days are longer than others, some days are shorter, and on the average the ...
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Why is climate change triggering faster rotation?
On July the 29th 2022, the Earth finished its rotation about 1.5 milliseconds earlier than the entire 24 hours. Scientists link this to climate change, saying that a possible reason could be due to ...
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Can I argue that the Earth's surface is an inertial reference to explain why we can't feel it's rotation? [duplicate]
Passengers on a plane cannot feel the plane move when it's at cruise speed. Can the same reasoning be extended to earth's rotation to explain why we cannot feel it rotate even though it's rotating at ...
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What's responsible for the earth to rotate and for the objects on it to rotate with it? [duplicate]
Three questions arose to me:
The first is what is responsible for the earth spinning? Is this just newton's first law in action - having been formed out of the material in the cluster of clouds after ...
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Will angular velocity of earth be Affected By this? [duplicate]
If all the humans, animals, and all other beings came together to North Pole of earth, Will it affect the angular velocity Of earth in any means?
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Earth's unimpeded rotation for billions of years [duplicate]
My nephew (7th grade) has stumped me with this question.
If I spin a top, it eventually stops, because of friction, air
resistance etc. How come the Earth has been spinning non-stop for 4.5
Billion ...
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271
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Why does the rotation axis of the Earth wobble over time?
I've learned recently that the rotation axis of Earth (axial tilt or obliquity) oscillates between 22.1 and 24.5 degrees.
I would like to understand why does that happen.
Having a basic understanding ...
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516
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Can we stop the Earth from spinning?
When we walk on the ground, we push the ground backward and hence the ground pushes us forward and we change our position. The effect of our force on the Earth is very minute (literally negligible) ...
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Can centrifugal force inside Earth's outer core overcome gravity?
As the gravitational field inside Earth outer core is relatively weak can the angular momentum of Earth's outer core be high enough to cause lighter elements or compounds being deposited in Earth's ...
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Effect of Earth's Rotation on Time [closed]
According to Wikipedia:
Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation. Atomic clocks show that ...
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Angular momentum of the earth
We know the tidal waves are decreasing the spin rate of the earth which causes the days to longer, so as the angular momentum of the earth decreases it means it rotational kinetic energy also ...
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Variance of earth's rotational speed due to tidal effects
I recently watched a video that explained how the length of the day was impacted by where the Earth was at in its orbit around the Sun. Consider a "day" for a point on Earth the period from when the ...
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3
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Could traffic acceleration/deceleration change the rotation of Earth? [duplicate]
For example at a stop light where multiple cars and trucks are accelerating at the same time all the torque from all the vehicles.
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550
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Conservation of Angular Momentum -- Earth-Moon System -- Earth spin backwards?
I am developing an exhibit for a museum. We want to show how the Earth's spin rate changes as the Moon drifts farther and farther out from the Earth. The visitor has a slider they can move to set ...
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Confusion about angular momentum of earth-moon system
My assumed definition of angular momentum is the sum over $i$ of $L_i =r_i\times{\omega_i}\times{r_i}$ for each particle about some origin.
We have two spheres rotating about the centre of orbit. For ...
user86425
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1
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How much does NASCAR affect the rotation of the Earth? [duplicate]
Many of us will be familiar with XKCD 162: Angular Momentum, in which someone spins counterclockwise to slow down the rotation of the earth and make the night longer.
The mass of an individual human ...
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Could enough people spin Earth backwards faster than they could run? [duplicate]
So, consider the theoretical situation in which the earth is no longer spinning, and we want to spin it up by running in the opposite direction (Yes, this question was inspired by the Nike commercial)....
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What will happen if rotation of Earth will get reverse? [duplicate]
Today one question pop up into my mind... What will happen if Earth spinning about its axis and around the sun will start moving in reverse direction... Whether it will affect us... What are all ...
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Would the length of the day change if everybody in Britain switched to driving on the right?
I found this question on the internet and I feel curious about it. I assume that even if the direction were to be switched, it would not matter because the people driving from east to west and vice-...
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Will the Earth flatten out?
Since the rotation of the earth makes it more flat,due to the centrifugal forces, is it not possible for the force to completely flatten out earth into a plane ?
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Does Earth's precession rate change with the seasons?
As Earth's precession is caused by the differential solar, etc., attraction to its 'spare tire', then does the rate go to ~zero at the equinoxes and ~twice the average at the solstices? (preferred ...
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670
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Does Earth rotate around its geometrical axis OR the center of mass of Earth-Moon system?
I just came to know about barycentre. What exactly is this?
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How does Earth rotate on its axis, clockwise or anti-clockwise?
How does Earth rotate on its axis, clockwise or anti-clockwise? How does Earth orbit around the Sun, clockwise or anti-clockwise? How do Earth's satellites orbit around the Earth, clockwise or anti-...
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What happens if the Earth's rotation slows down? [closed]
Instantaneous stop
I've seen a few posts about what happens if the Earth stopped moving completely. Most seem to assume a scenario in which the Earth stops rapidly. In such scenarios, I have read ...
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Why is Earth rotating along $x$(day and night) and $y$(tilt, causing seasons) axis, but not along the $z$ axis (taking $z$ as the axis along orbital)?
I have read this:
http://en.wikipedia.org/wiki/Axial_tilt
It is obvious that the rotation of any planet is a combination of rotation along three axis x,y,z.
Lets take the z axis as the one being the ...
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Effect of humidity on length of the day
Do we have any data on how humidity in the air or storms and tornados change Earth's angular momentum by moving masses of water at higher elevations. By doing so they change earth's angular momentum ...
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Why don't we feel the subtle speed change of Earth's elliptical orbit?
Earth's orbit is a slight ellipse, so to conserve momentum its speed increases when it is closest to the Sun. If the speed changes there is an acceleration. If there is an acceleration there is a ...
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What factors will make Earth re-rotate again if it stopped? [closed]
"What will happen if Earth stopped rotating?" have been answered multiple times with a lot of informative and interesting answers. Continuing this hypothetical question, I have another one in mind.
...
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615
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Coriolis object deflection and conservation of angular momenutum
I'm trying to understan kinematic inertial explanation of the apparent deviation of objects due to fictitious forces in rotating Earth.
Take an object moving from the equator northwards, or ...
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Deviation of free falling objects (Coriolis effect) using conservation of angular momentum
I read this pdf on non inertial frame, in particular I have a question on the deviation of free falling object due to Coriolis effect.
Consider a ball let go from a tower at height $h$. The ...
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Could an asteroid land slowly on Earth's surface?
The concept in my mind is that an asteroid is on a vector similar to Earth's, but slightly slower (e.g., 50kmh slower). As Earth passes it, it enters the atmosphere at a sharp angle, and since Earth ...
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Can humans control rotation of the Earth?
I'm a class 12th student and this thought just struck me from nowhere.
Assume a situation where every human on this planet turns towards west. All of them start walking simultaneously in west ...
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What would happen if the Earth was in a polar orbit around the sun?
This is a question that has been bugging me for a while now, I was wondering about the effects on the Earth if it was in different orbital situations to what it is now, and one of those was what would ...
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Why is the tilt of Earth in sync with an orbit around the Sun?
Is there any physical reason the changing tilt of Earth (which gives rise to our seasons: Spring, Summer, Autumn and Winter) is in sync with an orbit of the Sun (i.e. one year)?
It can't just be ...
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Why does earth spin counter-clockwise?
If we observe the earth from the north pole, we can see that the earth is rotating counter clock wise direction. The earth spins due to angular momentum, but why only in counter clock wise.
Why ...
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If 1% of total water in earth evaporates to the atmosphere due to Global Warming, what will happen? [closed]
My views
Atmospheric volume increases.
Mesosphere's temperature will increase. Resulting no rainfall.
Some H2O molecules will escape to the space.
Rotation of Earth will slow down, resulting the ...
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if the Earth's rotation was slowed down, would it naturally speed back up as it was before? [closed]
Fact: The Earth is rotating on it's own axis every 24 hours.
Question: If, for some reason I won't specify the current speed of the Earth and could slow it down(say by 5%). Will it speed up again ...
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1k
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Will the day/night cycle change when the poles melt?
I want to know what will happen to day and night if poles melt i think it will change but I don't know why? ^_^
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How does the Earth rotate, given that the torque acting on it while revolving is zero?
I've come to understand that the torque acting on the Earth while revolving the Earth is zero. Torque is the force responsible for rotation of a body. So how does the Earth rotate?
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241
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Why is the Earth self-rotating? [duplicate]
What drives this happen? Would it be the internal energy or by an external force? I did try to Google the answer, but could not find a good one.
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How much effort would be required to fix the Earth's rotation?
Given that the earth's rotation has been slowing down by very slight amounts over time, forcing us to introduce leap seconds and so forth into our clocks and calendars, I would like to ask if this ...
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Why does the Earth rotate on its axis?
I know that the earth moves around the sun because of the gravity force, because the spacetime around the sun is curved.
But why does the earth rotate on its axis, and which parameters can affect ...
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Can a Storm make the day longer/shorter?
I've read that changes in jet streams can affect the speed that the Earth rotates on its axis, thus making the day longer or shorter?
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