Questions tagged [coriolis-effect]
The coriolis-effect tag has no usage guidance.
205
questions
1
vote
0answers
15 views
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 ...
0
votes
1answer
49 views
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 ...
3
votes
1answer
42 views
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 ...
5
votes
2answers
185 views
The 3 apparent forces of the rotating frame in Quantum Mechanics
I was wondering how to derive the 3 typical "fictitious" forces that arise in a rotating frame. Their derivation in classical mechanics is clear to me, but not in quantum mechanics.
...
1
vote
0answers
34 views
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 ...
1
vote
1answer
35 views
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 ...
0
votes
0answers
50 views
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 ...
0
votes
3answers
108 views
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 ...
1
vote
2answers
98 views
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 ...
7
votes
4answers
1k views
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 ...
0
votes
2answers
38 views
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 ...
14
votes
4answers
2k views
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 ...
0
votes
0answers
24 views
If I'm moving with velocity $v$, on something that is accelerating perpendicular to $v$, do I feel or detect a “Coriolis force”?
Can I detect a coriolis force? Or does coriolis force only apply to rotating accelerations? Do I feel something analogous to a coriolis force? It seems I must. Because on a small patch of the planet ...
1
vote
3answers
103 views
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 ...
1
vote
2answers
51 views
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 $\mathrm{A}=\mathrm{G}_{0}$
...
The apparent force to an ...
0
votes
0answers
26 views
What if there's no friction In the Ball on a rotating disc problem?
In the rotating frame of the disc , how does centrifugal and coriolis come into play if there is no friction? The ball is kept at r in rest on the disc. And then the disc is made to rotate.
Now from ...
0
votes
2answers
78 views
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. ...
0
votes
0answers
19 views
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 ...
1
vote
0answers
87 views
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 ...
0
votes
1answer
32 views
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) ...
0
votes
2answers
85 views
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 ...
3
votes
2answers
48 views
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 ...
1
vote
1answer
55 views
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? ...
6
votes
1answer
87 views
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 ...
0
votes
2answers
160 views
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 ...
0
votes
0answers
29 views
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 ...
1
vote
2answers
114 views
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 ...
0
votes
1answer
671 views
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....
0
votes
2answers
96 views
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 ...
1
vote
2answers
197 views
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 ...
0
votes
3answers
168 views
Coriolis effect vs preservation of angular momentum on merry-go-round, sniper's bullet, hovering helicopter and high altitude rockets
I understand that how helicopter hovers at the same position or a thrown ball falls to the same position even though earth is spinning. This is due to the preservation of angular momentum and my ...
1
vote
1answer
87 views
General relativity and absolute rotation
Are both centrifugal force and Coriolis force really fully explained by what is called "frame dragging" in GR? And if that is correct, does this concept "frame dragging" solve the ...
0
votes
1answer
62 views
Foucault pendulum and atmosphere
I'm a bit confused with how the foucault pendulum works.
EDIT for clarity:
The Foucault pendulum shows an effect which is commonly described as follows: the plane of oscillation of the pendulum seems ...
0
votes
1answer
56 views
Can the Coriolis force be entirely neutralized by the Lorentz force?
I have recently hit upon an idea with which I try to make an analogy between the Coriolis force ($\mathbf F = 2m\mathbf v \times \mathbf \Omega,$) and the Lorentz force ($\mathbf F = q\,\mathbf v \...
0
votes
2answers
59 views
Why specifically should a Foucault pendulum be long and massive?
For a pendulum to easily demonstrate the Foucault effect, it should
have as long a cable as possible (this one is 52 feet) and a heavy
symmetrical bob (this one is hollow brass, weighing about 240 ...
1
vote
1answer
130 views
How to understand pseudo forces in the Lagrangian formalism?
Consider a free particle in a rotating reference frame. Let us say the coordinates of the particle are given by $(x',y')$ in this frame. For an observer on this frame, (I suspect) the Lagrangian is ...
0
votes
1answer
192 views
Can pressure gradient force be balanced by Coriolis force?
I was learning about wind from my class textbook. In that there is first a description of forces affecting the velocity and direction of wind followed by that is geostrophic wind.
My question is:
At ...
0
votes
0answers
103 views
How to determine a direction of Coriolis force at southern hemisphere
If I take my rotating coordinate system as it's shown in the below picture :
Why does using $F=-2mw\frac{\mathrm{d}r}{\mathrm{d}t}$ for a free fall of a particle in the southern hemisphere give me ...
0
votes
3answers
55 views
How does GR treat centrifugal force/acceleration?
We know GR turns gravitation induced acceleration into curvature in spacetime.
But in GR, what happens to the acceleration due to the centrifugal force?
And similarly, the acceleration due Euler or ...
1
vote
2answers
57 views
Coriolis force, no latitude change
If you move an object without changing its latitude, according to $$ \vec{F}_c=-2m\vec{\omega}\times\vec{v} $$ you could add or substract weight to the object itself, depending on the $\vec{v}$ ...
2
votes
2answers
266 views
SI Units and the Coriolis Parameter
I am trying to solve the following equation numerically $$|u_\text{max}|=\frac{\Delta p}{|f|\rho}\frac{\sqrt{2}}{R}\mathrm e^{-1/2} \tag{1}.$$
Here, $\Delta p=20\ \mathrm{hPa}$, $R=500\ \mathrm{km}$ ...
0
votes
2answers
247 views
Feynman Lectures: 20–3 The gyroscope
In the The Feynman Lectures on Physics, Volume I, Chapter 20, Section 3,The Gyroscope found here, Feynman wrote
We note that when the wheel is precessing, the particles that are going around the ...
14
votes
6answers
3k views
Physical meaning of the Coriolis force
Consider the equation $\vec{f}=f\hat{z}$. Here, $f$ denotes the Coriolis parameter $f=2\Omega \sin(\phi)$ and $\hat{z}$ denotes the vertical unit vector.
How can we think of $\vec{f}$ physically? I ...
0
votes
2answers
87 views
Factor of 2 error in angular momentum / Coriolis force calculation
The problem
An object is dropped from a helicopter, which is at rest relative to the Earth rotating at $\Omega$ at height $h=500\text{ m}$ above the ground at the equator.
Without using the Coriolis ...
1
vote
3answers
104 views
Is the time for a complete rotation of the plane of swing of a Foucault pendulum only a function of latitude?
The context is explained in this post:
What is the reason for the orbital movement of the Foucault pendulum?
But now my question is not about the orbital behaviour of the pendulum.
I wonder if the ...
2
votes
2answers
95 views
Can black hole experiences Coriolis effect?
The weather here are thanks to Earth's rotation, so would there be any coriolis effect however tiny occurs when black hole rotates?
0
votes
0answers
49 views
Foucault pendulum coordinate representation
I have a homework question that boils down to showing that plane of oscillation for a Foucault pendulum rotates 2$\pi\cos(\theta)$ in a day, where $\theta$ is the colatitude angle. I have seen an ...
1
vote
0answers
48 views
Physical importance of centrifugal force and Coriolis force in the context of the restricted 3-body problem
In the textbook Galactic Dynamics (Binney and Tremaine), the restricted three-body problem to find the trajectory of a test mass that orbits in the combined gravitational field of two masses $M$ and $...
1
vote
2answers
134 views
Deflection of a Falling Mass at pole
I know that falling objects on the earth are deflected horizontally.
But could anyone tell me how can we calculate the deflection of a mass m dropped from a tower of height h at the north pole?
1
vote
1answer
91 views
What is the reason for the orbital movement of the Foucault pendulum?
The Foucault pendulum, now in exhibition at the Paris Pantheon, is 67 meters high, with a period of oscillation about 16 s. Its oscillations last for more than one hour, when an employee manually ...
