Questions tagged [centrifugal-force]

Centrifugal force is an inertial (pseudo or fictious) force used in a non-inertial frame of reference in order to apply the Newton's laws of motion. If your question is about centripetal force, which is a real force that points towards the center of a circular trajectory, use the tag "centripetal-force" instead.

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Difficulty understanding why acceleration of free fall is lower at the equator than the poles

I have been told that the acceleration of free fall is lower at the equator than at the poles, and that this has to do with the fact that at the equator, you are moving with circular motion so ...
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Why are planets not torn apart?

There are two forces we know, Centripetal force (or Gravity) and Centrifugal force. Both are applied to all the planets including earth. Planets are kind of spherical due to gravitational force but ...
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Do you experience no centrifugal force when in orbit?

I think that the answer is no, but in some sense it feels counter intuitive so I just wanted to check here. So if I understand it correctly, the General theory of relativity tells us that any ...
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Does the centrifugal force exist in inertial frames too?

Suppose I have a string hinged at one end and the other end attached to a body is to start a circular motion. We all know that the tension force is just an aspect of the electromagnetic forces ( ...
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Does a rotating rigid ring (or other rotating rigid body) in space generate heat?

I don't have training in physics (so forgive me if I use the wrong terms or mix up concepts), but I was thinking about “artificial gravity” in space. If a spaceship were being propelled by some force, ...
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Centrifugal force of static observer at North Pole

This question is somehow related to Newton's bucket and absolute rotation concepts, but applied to a simple, tangible scenario. Let's suppose I could hover over the North Pole, and "detach" ...
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4answers
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When a train starts, the head of a standing passenger seems to be pushed backward. Can we consider it as pseudo force?

Pseudo force always acts in a non-inertial frame and it is always opposite to the direction of the body's acceleration. The backward push is of course inertia, but can we consider it in this manner (...
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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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Centrifugal pressure of the inner core towards the outer core of the Earth

As we go towards the center of Earth the gravity weakens. Does that mean that due to absence of gravity the outer part of the inner core exerts a pressure against the inner part of the outer core of ...
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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 ...
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How is centrifugal force doing work here?

Q) A plane spiral made of stiff smooth wire is rotated with a constant angular velocity $\omega$ in a horizontal plane about the fixed vertical axis O. A small sleeve M slides along that spiral ...
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What is the concept of “Centrifugal Force”?

Pls explain the intuitive concept of centrifugal force in different situations.
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What about Newton's potential prevents singularities in the two-body problem?

The solutions to the gravitational two-body problem can be described by conic sections. In particular, two abstract point masses don't collapse into each other (that is, do not get arbitrarily close ...
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Are most planets hollow?

You bore straight down inside the Earth. The further you go, the less gravity you experience, because mass above you grow, and mass below you shrink. At the (ideal) center, gravity cancels out to zero,...
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Why is the moon in free fall? Isn't there a centrifugal force acting on it? [duplicate]

An object is in free fall when the force acting on it is exclusively gravitational. But why then is the moon in free fall? Isn't there a centrifugal force acting on it?
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Bending of a cyclist while taking a turn on a horizontal road

I am a high school student and my teacher taught me that a cyclist bend while taking a turn on a horizontal road because if he doesn't bend it then it will rotate due to net torque of friction about ...
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How can the Normal Force on an upside down roller-coaster car point upward?

Q: An amusement park proprietor wishes to design a rollercoaster with a vertical circular loop in the track, of radius $R = 20\, \rm m$. Before the cars reach the loop, they descend from a maximum ...
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Centripetal force for a rotor or centrifugal force?

From basic physics any object experiencing a uniform circular motion, experiences a centripetal force. However in electric machines at high speed the rotor would be deformed outward as if a ...
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How does effective potential reduce a two variable problem into a single one?

https://en.wikipedia.org/wiki/Effective_potential In this wiki link, They write $$ E = \frac{1}{2} mv^2 + \frac{1}{2} mr^2 \omega^2 - \frac{GMm}{r}$$ Then they sub $$ L= mr\omega$$ Which turns the ...
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Why is the centripetal force non-conservative while the centrifugal isn't?

Aren't both perpendicular to $R$? Also, doing $\nabla \times \vec{F}$ using $\hat{r}$, $\hat{t}$, $\hat{k}$ as versors (with $t$ tangent to $r$ and $k$ perpendicular to the surface) i get $0$ with ...
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If the fictitious forces (ex: centrifugal) help the observer feel stationary, why does the person feel a force in the opposite direction?

I searched and viewed similar questions on here but still am very confused. Is it because of the observer's inertia? If so, shouldn't we feel a 'push' towards the point where we are actually ...
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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 ...
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Feynman 20-4: Question regarding centrifugal force and rotation in three dimensions

For full reference, refer to https://www.feynmanlectures.caltech.edu/I_20.html#Ch20-SUM Here's the quote that I think is relevant to the question: 'Consider a wheel that is fastened onto a shaft in a ...
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Gravitation: Collision of a satellite and Meteorite [closed]

A satellite is orbiting around a planet in a circular path of radius $R$. A meteorite of mass $m$ collides with the satellite and sticks to the satellite. After collision, the satellite is seen to ...
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Are Newton's equations accurate on Earth when we ignore fictitious forces?

I am a high school student and I just got to know about inertial and non-inertial frames of reference. And since the earth is actually accelerating around the sun, and the sun is also accelerating, ...
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Is the apparent gravitational force on certain parts of a rotating spherical planet off centre?

For a person standing at the equator, if he sees an object in free fall, he will see that the object accelerates downward at the rate $$a = g - \omega^2R$$ where $R$ is the radius of the planet and $\...
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Physics of a coin on a turn table

Suppose a coin is placed on a turn table which is then rotated. The coin initially rotates along with the disk and may fly off eventually. My question is, why is static friction acting radially inward ...
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What happens to water if you put into space while spinning?

What happens to water if you put into space while the water is spinning around like an empty circle? Or a round tube shape if you like.
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Does a ball that rolls inside a rotating wheel experience centrifugal force?

Can you help me with a 'contention' I have with my university supervisor? Apologies if this has been answered elsewhere. I have a device that can be modeled as a wheel/tire with a ball inside (in 2D) -...
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Why does the amplitude of a pendulum increases when continuously changing the rope length? [duplicate]

The simplistic answer is that I'm pumping energy into the system thus the velocity increases and so is the amplitude. I'm more interested in understanding it from forces considerations.
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Centrifugal acceleration in projectile motion

In projectile motion, let's take any point on it's trajectory i.e. we are talking about an instance where the particle is. Then, is there any centrifugal force acting in the opposite direction to the ...
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Direction of Centripetal Force [duplicate]

Centripetal force is directed towards the center, then why does an object placed on a rotating disc move outwards? On the other hand, when a particle is placed in a cylindrical container containing ...
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Centrifugal force is fake. Why? [duplicate]

Why centrifugal force is called as pseudo force even though it acts on objects which are there in circular motion?
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Is there really a southwards 1 N force on me due to my latitude?

I live in the UK at approx. $53 ^\circ$ latitude. The horizontal component of my centripetal acceleration due to the Earths spin works out at $1.3$ N. That's like the weight of an apple. Is that ...
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Why does circular motion stop when the rope breaks?

why is it that when a ball spinning on a rope has a centripetal force larger than the tension of the rope (due to exceeding the maximum velocity), the rope breaks and the ball goes off in a tangent? ...
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Is inertia the same as centrifugal force?

My cousin told me that inertia is just a pseudo force that act on a thing, because he said that inertia is the same as centrifugal force. But when I search for the true fact in Google, I found that ...
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Does Acceleration due to Gravity take into consideration the centrifugal acceleration due to Earth's spin?

Is the gravitational acceleration we consider only the attraction due to the Earth's gravity or is it that of gravity plus the attraction due to Earth spinning? We know that earth produces an ...
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Is this vector diagram of the forces at play in turning flight correct?

See this image from page 5-24 of the FAA's Pilot's Handbook of Aeronautical Knowledge (2016 edition). For the purpose of this question, let us take the Newtonian perspective that Weight is an actual ...
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How do I quantitatively explain the effects of the centrifugal force from inertial frame of reference?

So I learn earth science in school, and today, I was taught about the variation of earth's gravity according to latitude, and I've been told it's because of the combination of the fact earth isn't ...
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Analytical expressions for acceleration due to zonal harmonics of a gravitational field?

Wikipedia's Geopotential_model; The deviations of Earth's gravitational field from that of a homogeneous sphere discusses the expansion of the potential in spherical harmonics. The first few zonal ...
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Rewriting the Lagrangian in terms of the constant(s) of motion doesn't work. Why? (spherical pendulum) [duplicate]

I am trying to solve for the equations of motion to simulate a spherical pendulum. I decided to use the spherical coordinates. The Lagrange equation is, $$ L=T-V=\frac{1}{2}m\left(l\dot\theta\right)^2+...
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What is centrifugal force relative to? [duplicate]

Edit- the answer is mach's principle and mach's principle is sketchy so there is no good answer. So I understand that centrifugal force is really just inertia and stuff but I still have a question. ...
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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 ...
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How to represent a coordinate system precessing around the centre of force?

Is the centre of force same as the centre of mass of two rotating objects? If we set the coordinate system that is precessing around the centre of force, it will be a non-inertial frame of reference. ...
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2answers
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Would an astronaut, alone in space with no reference point, get dizzy? [duplicate]

I’m not quite sure of the biology behind it, but for my question let’s assume that spinning of any kind would cause dizziness as a more dense object would sink to the outside of the body showing that ...
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If centrifugal force is a pseudo-force then why we can observe its effects outside of rotating frame?

I know that centrifugal force only "exists" when the reference frame is rotating. In this case, if there is centripetal force, there must also be centrifugal force so that bodies on the rotating frame ...
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How can we artificially reduce gravity on a planet to live there? [closed]

It is relatively simple to increase the impression of gravity by using spin, either on a low gravity planet (inside a rotating parabola) or in orbit (inside a rotating cylinder). However, I can't ...
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What is the reaction force of centripetal force? Can centrifugal force be its reactive force? But both of them act on differnet bodies right?

In my textbook it is written that centrifugal force is not the reactive force of centripetal force because it acts on differnet bodies. Then what will be the reactive force (as Newton's 3rd law states ...
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Can we use $F_{\rm net} = ma$ for fictitious force? [duplicate]

For instance, in a non-inertial frame of reference, the net force of an object in a circular motion = (Centripetal force - centrifugal force) = 0. So, my question is... Can the net force = ...
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Creating Artificial Gravity In A Smaller Craft Where Energy Was Not An Issue - Energy Required To Do So?

If you had a craft say the size of the spaceship in Guardian Of The Galaxy, big enough for a few rooms, etc. Now say you wanted to create gravity(artificial using centrifugal force) and energy was ...

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