Questions tagged [coriolis-effect]
An effect whereby a mass moving in a rotating system experiences a force (the Coriolis force ) acting perpendicular to the direction of motion and to the axis of rotation.
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A question for expert in geometrical method and Riemannian metrics
I'm a physical oceanographer with great interest in Theoretical Geophysical Fluid Dynamics. I have some ideas on the possibility to derive the so-called: geostrophic equilibrium (i.e. on a rotating ...
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Is this a rigorous derivation of Coriolis effect? It seems pretty simple
Coriolis effect is usually derived in a long twice differentiated equation of motion between a lab frame and rotated frame. Afterwards you group together all the terms and you get all the fictitious ...
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Coriolis effect on the nucleus?
Would there be a coriolis effect on the (surface) of the nucleus? Since the nucleus can be approximated as a 'liquid drop' which rotates.
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Coriolis force on surface of neutron star?
Since neutron stars are extremely rapidly rotating, would there be an interesting effect of the coriolis force on the surface?
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Coriolis effect when walking along equator
Okey, I'm thinking about a problem like this:
Suppose we walk along the equator, let's choose the east directon (for example). Let our walking speed be $v$, then from the coordinate system that ...
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Rotational frames and Coriolis deviation
I have a question regarding a problem that is the deviation of an object due to the rotation of the earth ( cause by pseudoforces ). I've seen this video on youtube https://www.youtube.com/watch?v=...
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Could we measure fictitious forces arising from rotation about an axis in a fourth spatial dimension?
Two-dimensional creatures confined to a flat sheet that was uniformly rotating around an axis perpendicular to the sheet would have no trouble identifying that their sheet was rotating. They would be ...
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Finding latitude of landing of projectile in Rotating Earth
Assuming that the Earth is a uniform sphere of radius $R$, rotating about its axis with a uniform angular velocity $\omega$. A rocket is launched from the Equator in a direction due North. If it keeps ...
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Negative sign on Coriolis acceleration not necessary?
Why is the Coriolis acceleration often written as $-2({\bf \Omega \times v})$, (for example Wikipedia)? Why is it not written $2({\bf v \times \Omega)}$ which means the negative sign is not needed? ...
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How would a game of (American) football work on a space station generating artificial gravity by using spin? [closed]
Using rotation to generate artificial gravity is pretty common in sci-fi. I know the TV show "The Expanse" features it on the Mormon's vessel. I also remember a small-scale rotating space ...
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Can this phenomenon be explained in ground frame?
Suppose there is a disc which is rotating about its centre with constant angular velocity, the surface of disc is rough and there is a small block at some distance away from centre (at rest initially),...
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Differential Rotation
The acceleration of an object measured by a fixed observer A relative to an observer B that is in a rotating frame, rotating with constant angular velocity $\Omega$ is $$a_A = a_B + 2\Omega \times ...
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Why is the JWST orbit only taking 30 days?
Presumably the Ariane 5 rocket launched the James Webb Space Telescope into an elliptical orbit with its apogee at the L2 point. Such an orbit’s period is about 70 days, i.e. the journey to L2 should ...
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What determines handedness of wind circulation around pressure extrema in the atmosphere?
I'm reading a textbook (Atmospheric Science - An Introductory Survey 2nd ed, John M. Wallace • Peter V. Hobbs) which states (p14):
The winds observed in the Earth’s atmosphere closely parallel the ...
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Can a bullet travel all the way around a centrifuge?
I'm not planning to shoot any astronauts, but researching a problem for a story.
Picture a rotating centrifuge in space, spun to generate artificial gravity, like so: https://media.wired.com/photos/...
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How do Hurricanes Form?
I'm an Undergraduate Physics Student and I just went down the rabbit hole of asking "What's the Physics of Hurricane Formation?" when I discovered a few things and came up with even more ...
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Coriolis acceleration and conservation of angular momentum
I am trying to do a derivation the results of angular momentum, but I am running into an issue.
To make things simple, lets start with the derivation of angular momentum:
$$L = mr^2\omega$$
If we ...
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Vertical coriolis effect
Imagine the Earth to be an extended body, spinning about an axis. Suppose we throw a ball vertically upwards. As soon as the ball leaves our hand, it starts traveling upward with some velocity and ...
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Direction of deflection due to Coriolis Effect
I have a massive confusion regarding the direction of deflection due to the Coriolis effect.
Suppose, a ball is shot from the equator to the north pole. Initially, the ball has an eastward velocity, ...
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How do observers in inertial frames explain fictitious forces?
Suppose a ball is thrown upwards, from the surface of the Earth. After some time, it will obviously fall down back on the surface. However, it would be deflected slightly to the sides of the initial ...
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Question about the direction of Centrifugal and coriolis force
I can't understand how the cross product of $\hat{\mathbf{z}}$ and $\hat{\mathbf{r}}$ works in the equation of centrifugal force and the same cross product between $\hat{\mathbf{z}}$ and $\hat{\...
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Coriolis force at small scale
I would premit that I am not an expert (just an enthusiast) and my mathematical background is limited. That said I am trying to figure it out if the effect of coriolis force of big system (our planet ...
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What is the relative importance of the Coriolis term to the precession term in frame dragging by rotating Kerr black holes?
The Wikipedia entry for Thirring precession describes the Coriolis term as separate from the precession term. Is it fair to say that when looking at the dynamics of a rotating black hole, the ...
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Pseudo force and Potential energy
The pseudo force equation is
$$\vec F_p=-2\,m\,(\vec \omega\times \vec v)-m\,(\vec\omega\times (\vec\omega\times \vec R))$$
where $~\vec v=\dot{\vec{R}}$ and $~\vec\omega=\text{const.}$
the pseudo ...
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Can a pendulum at resting equilibrium position still demonstrate the Earth's rotation?
I conducted an experiment in my youth, creating a 'sand pendulum' hanging from the bedroom ceiling to a bowl of flour. I did not set the pendulum into motion, but rather wanted to see if the force of ...
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The 3 fictitious forces of the rotating frame in Quantum Mechanics
I am wondering how the 3 typical fictitious forces (centrifugal, Coriolis, Euler) typical of a rotating frame manifest themselves in Quantum Mechanics.
Background (classical point particle): we have ...
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Precession of a flywheel on earth
I’m currently working on a mechanical problem and I’ve got a couple of questions. First, let me describe the problem. We’ve got a flywheel somewhere on the surface of the earth spinning merrily. It is ...
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Electric currents due to the Coriolis force?
In the Compton generator experiment one uses a hollow glass tube filled with water. When this is flipped over, the water gains a small velocity of the order of 0.1 mm/s for a 1 m radius tube, due to ...
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Why is the propulsive force related Coriolis term ignored in flight dynamics (rocket equation)?
Consider a variable mass vehicle body $B$ with it's center of mass $B$ stationary with respect to the body fixed referenced frame $B$. We obtain the translational dynamics of the variable mass body as ...
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Does Coriolis effect change the direction of an object moving parallel to equator, say along the tropic of Cancer?
It is usually said that the Coriolis force deflects a horizontally moving object to its right in the northern hemisphere and to the left in the southern hemisphere, and an object at the equator will ...
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Calculate height of a projectile in rotating spaceship reference frame
In a rotating reference frame, or in a rotating spaceship, the apparent gravity felt by an object is the centrifugal force. Any moving object also experiences a Coriolis force. When I want to do ...
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Does the Coriolis force act on all objects?
Would, for example, a train traveling from south to north experience this force? If so, why? I would think it does not, since it is in contact with the Earth, so it does not experience the difference ...
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Circular Winds and Coriolis force
In northern hemisphere the flow of air is shown which tries to move towards low pressure center but due to Coriolis is deflected as shown.
It's said that this causes a circular anticlockwise flow of ...
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Would Foucault's pendulum work on the moon?
I am taking a course in introductory general relativity and came up on this question, which a google search didn't answer.
The rotation of the Earth can be measured using a Foucault pendulum.
The moon ...
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Why does Coriolis point this way intuitively?
The Coriolis force points as is shown. I understand it mathematically.
I want an intuitive picture how it's true
Say I'm in the rotating frame of the earth and I look at the particle in the northern ...
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Why only one pseudo force for a revolving frame?
Pg 348, Kleppner and Kolenkow.
Earth in a free fall towards sun is shown.
Authors write
The earth accelerates toward the sun at rate $\mathrm{A}=\mathrm{G}_{0}$
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The apparent force to an ...
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When does Coriolis and centrifugal force act?
Ok so here is the situation you are on a disc rotating with the same angular velocity at the center so you are in a rotating frame of reference. A block is placed.
Case 1:
The disc is frictionless. ...
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Does sphere's movement get affected if the frictionless surface below it rotates?
If a sphere has a constant velocity going in a straight line on a frictionless surface that rotates, from an inertial frame of reference, does the ball continue to travel in the same direction and ...
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Confusion in coordinate transformation of acceleration vector
Consider this notation for vectors:
$A_{cb}^{d}$ is the $A$ vector (velocity,acceleration, angular velocity or ...) of $b$ coordinate frame w.r.t. $c$ frame presented in $d$ frame axis.
I know when we ...
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Planetary vorticity vector calculus
The planetary vorticity is the vorticity due to the rotation of the planet. This should equal the Coriolis parameter. Let $\Omega$ be the angular velocity of the planet ($U_p$ the rotational velocity) ...
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What happens when the centrifugal force and Coriolis force combine?
Imagine someone is walking on a merry-go-round as it spins. Let's say the merry-go-round has a painted circle on it that is concentric with the outer edge of the merry-go-round and the person walking ...
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Running backwards on a carousel
Let's suppose I'm on a carousel rotating with a speed $\omega$ and start running on it in the opposite direction with a speed $v$ such that $\omega r=-v$ where $r$ is the distance between me and the ...
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Foucault pendulum equations of motion
All the sources I see for the equations of motion for the Foucault pendulum start with the small angle approximation. Does anyone know a source or textbook that does the full derivation? ...
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Can rotation be distinguished from frame-dragging?
I am trapped inside the usual elevator and experiencing a comfortable gravitational field of about 1 g. Or perhaps it's an acceleration of 1 g. I cannot tell which.
However, I notice when I drop an ...
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The time derivatives of vectors in rotating frames
The image is from Goldstein's book. Here he is saying that the vector in LHS is observed in space frame and the $\frac{d\textbf{G}}{dt}$ in RHS is in body or rotaing frame. By using this he proved the ...
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Equivalence Principle on Earth
I've read that, according to the Equivalence Principle, no experiment can distinguish between uniform acceleration and gravity. If one is in the classically-described elevator with a basin full of ...
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Coriolis force and liquid on a rotating space station?
On a rotating wheel space station crewed by humans with sea-level conditions (temperature above the freezing point), if liquid was spilled on the floor am I correct in understanding that the Coriolis ...
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Application of Coriolis force and centripetal acceleration
Consider a slider capable of sliding on a rod. The rod has a constant angular velocity of $\omega$, and the slider is moving up the rod with a velocity $v$ and acceleration $a$ with respect to the bar....
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How is the spin of hurricanes explained from an inertial frame?
I have read that hurricanes spin because of the Coriolis effect. Since the Coriolis force is a ficticious force, which is only present in a frame that is rotating w.r.t. to an inertial one, I am ...
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Coriolis Force: Direction Perpendicular to Rotation Axis Visualization
The Coriolis force acts in a direction perpendicular to the rotation axis and to the velocity of the body in the rotating frame and is proportional to the object's speed in the rotating frame (more ...
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