Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [centrifugal-force]

The tag has no usage guidance, but it has a tag wiki.

1
vote
0answers
21 views

Why is it that a stationary bike will fall but a moving one won't? [duplicate]

No matter how much I think about this I can't come up with a reason to me there is no difference In the forces acting against the tilting of the bike in both the cases as mothion is in the ...
0
votes
3answers
45 views

Inertial frames and Rotation: shooting up a ball from a rotating platform

A short cylindrical tube is fixated in a horizontal platform and shoots a ball vertically in such a way that it falls back into the tube. Now imagine that the platform is spinning with a certain ...
0
votes
3answers
67 views

Difference between center of mass and center of gravity

Let's consider a very tall building (g would be variable) which is rotating with the earth naturally. Now do the centrifugal force and the gravitational force act on the same spot? If not why does the ...
0
votes
0answers
20 views

How does a Foucault pendulum in an Earth-sized centrifuge precess? [closed]

Imagine replacing Earth with a centrifugal arm length Earth radius and rotating to produce acceleration g. How does a Foucault pendulum mounted on the end of the centrifuge move and why ? Ignoring ...
1
vote
1answer
65 views

How to get the acceleration of a rotating mass from it's centrifugal and centripetal components

Suppose I pull out a rope and rotate a small mass as in the diagram with its speed constantly increasing Where: $Q_1$ is the path of the rotating mass $m$ $Q_0$ is the center of the rotating mass ...
2
votes
1answer
57 views

Centrifugal force in effective potential

$$E = \frac { 1 } { 2 } m v _ { r } ^ { 2 } + \frac { L ^ { 2 } } { 2 m r ^ { 2 } } + U ( r )$$ This is the formula of total energy of an object with mass $m$ orbiting an assumed stationary body of ...
0
votes
4answers
71 views

Question on equivalence of acceleration and mass with respect to gravity

Layman’s question here. Let’s say I’m standing on the inside rim of a rotating space station spun at right rate to produce earth-like gravity. Does the spinning warp space time? If so, how can a small ...
-2
votes
1answer
33 views

Centrifugal force on spinning black hole?

I saw the term spinning black hole popping up everywhere so my question do spinning black hole behave similarly to say a planet where it bulge in the equatorial and compress at the poles? what ...
-2
votes
3answers
111 views

How to make a boy fall from the merry-go-round?

I want to make this boy fall in the game and not able to figure out a way or formula which is responsible to make this boy fall from merry go round We know centrifugal force and centrifugal ...
0
votes
1answer
53 views
35
votes
9answers
8k views

Does artificial gravity based on centrifugal force stop working if you jump off the ground?

In an answer to another question of mine, concerning gravity, there was a link to a video about creation of artificial gravity, based on rotation. The question I have might be silly (or with an ...
0
votes
5answers
150 views

If centrifugal force is fictitious, what force is real in its stead?

Here's an example illustration: The way I understand it, when the car starts turning, the centrifugal force at first does not exceed the force of friction, which allows the car to stir. But at some ...
3
votes
2answers
45 views

Deriving effective potential energy from the Lagrangian of a two-body system [duplicate]

I'm having some issues understanding how the effective potential energy of a two-body system is derived from the Lagrangian of the system. Specifically my issue is with one step... Suppose we are ...
2
votes
0answers
37 views

What is the dynamics of centrifugal force in non-inertial system? [closed]

I am trying to intergrate the centtifugal force and the integral of φ(dφ/dt)^2 appears in polar coordinates. Does anyboby know if i'm doing something wrong or if i'm not, does anyboby know the ...
2
votes
3answers
80 views

Do centrifugal force and gravity differ in their effects on objects?

If the type of object matters, consider the human body. If the situation matters, consider standing on the inside wall of an O'Neill cylinder compared to standing on the surface of Earth. "Differ in ...
2
votes
1answer
24 views

Earth bulge and axis precession

We know that earth is not spherical because it spins. Does every object that spins bulge? for example a rotating wheel bulges? Also how moon and sun create the torque that shifts the axis of rotation (...
5
votes
5answers
733 views

Is the normal force equal to weight if we take the rotation of Earth into account? [duplicate]

In my physics class we were doing problems such that we set $N$ (normal force) $= mg$. I understand that by Newton's Third Law, if I exert a force on the ground, then the ground will exert an equal ...
0
votes
0answers
42 views

Ball in a spinning disc

So imagine we have a disc at rest and a ball at the middle of its radius. Now the disc starts rotating with constant angular velocity. Where will the ball go? Will it remain at $R/2$? Watch this ...
40
votes
6answers
7k views

How does rotational “artificial gravity” differ from normal gravity?

I am not a physicist, just a curious mind. I was reading a novel by Iain Banks where it was mentioned, that shifting from artificial rotational "gravity" (in space, on a rotating space craft) to real ...
0
votes
0answers
40 views

How fast would the Earth have to spin to lose the atmosphere?

I have read these questions: How fast would the Earth need to spin for us to feel weightless? Why can't we feel the Earth (or being in any non-inertial frame) rotating? And it made me curious....
2
votes
4answers
111 views

Why can't we feel the Earth (or being in any non-inertial frame) rotating?

I have read this question: Why can't we feel the Earth turning? My question is different, because that question does not talk about (only the comments) the fact (that I think matters most) that ...
0
votes
2answers
173 views

What's wrong with the Big Spin Model?

A Dr. Serkan Zorba has a paper on arxiv in which he considers, what if the universe is actually slowly rotating? This gives rise to centrifugal and Coriolis forces on a galactic scale that seem to ...
0
votes
3answers
139 views

Artificial gravity in movie Interstellar

Cooper Station is somewhat like a hollow cylinder. Buildings are attached on the surface. It has artificial gravity to hold on buildings and people. If, a person needs to fly in this spot Will the ...
1
vote
1answer
58 views

A man on much faster spinning Earth decides to jump

Imagine that the Earth is spinning much faster than real situation and a man on the Earth's surface feels weightless. Suddenly the man decides to jump vertically with respect to the Earth. What will ...
0
votes
3answers
95 views

What forces make objects fly away from the axis of rotation? [duplicate]

If two spheres are mounted on a smooth horizontal bar along which they can slide and were initially brought together and connected by a thread. Then the whole assembly is set into rotation about a ...
1
vote
1answer
36 views

The Earth's Equatorial Bulge [duplicate]

It is stated that the Earth is a 'squashed sphere' due to the very slight bulge at the equator. (Thought in reality it's such a small difference, it's essentially spherical) Typical values: ...
2
votes
2answers
58 views

Are there any fundamental interactions behind centrifugal force?

Centrifugal force for the observer in a rotating frame is a force as real as the force of gravity. However I know that gravitational force is an interaction between a mass and another. And the agent ...
-2
votes
1answer
38 views

Are my arms pulled outwards when I sit on a rotating office chair? [duplicate]

Suppose I am sitting in an office chair in a room. Now someone just starts to rotate the chair. The chair is now rotating quite fast. I think my arms will be pulled outwards. Now from my point of ...
0
votes
2answers
50 views

How can this mass go off the edge of a disk?

If a mass rests at the edge of a disk, where friction acts on it, and the disk is rotated with an angular velocity just enough for this mass to slide out, then the linear velocity of the mass $v$ is ...
10
votes
1answer
1k views

Earth as a perfect sphere and an object trying to stand still

I have imagined the Earth as a perfect sphere with uniform mass density and I put an object somewhere between the equator and the north pole at rest with respect to earth. And also in my imaginary ...
2
votes
1answer
80 views

Free fall in a centrifugal space ship?

I have read the basics on O'Neil cylinders. A tube with a five mile diameter rotating almost 23 times an hour would produce forces akin to earthlike gravity at the rim. There would be a space in the ...
0
votes
1answer
124 views

Difference between the energy and the Hamiltonian in a specific example

The problem is the following: Consider a particle of mass $m$ confined in a long and thin hollow pipe, which rotates in the $xy$ plane with constant angular velocity $\omega$. The rotation axis ...
2
votes
1answer
29 views

Does the weight of a spinning gyroscope change how much weight it can sustain (stabilize)

Hello I recently watched a video about gyroscopes and I wonder what changes the amount of mass it can keep upright. EDIT: I did search online but I couldn't find a website which explains this in a ...
0
votes
2answers
99 views

Centripetal Force on Springs

Please could someone provide an explanation for this. I thought that increased velocity would cause greater centripetal force (which, I think, acts towards the centre of curvature) so would the ...
0
votes
1answer
89 views

Tension of a string on a rotating sphere and under the influence of gravity [duplicate]

I was studying about circular motion and found a topic that is apparent weight and found an equation of apparent value of g. But I can't understand why this is written
6
votes
7answers
1k views

Is the force which throws a body on a rotating disk outwards centrifugal force?

If some object is kept in a groove made on a disk and the disk is rotated with say constant angular velocity. Now as we know that the object moves outwards ie away from the centre of the disk. I ...
1
vote
1answer
99 views

Is there an absence of centrifugal forces in rotating frame of a pulley or in belt friction derivation?

Considering a pulley or belt I understand the derivation of the difference in tension(capstan equation) due the resultant torque needed for the pulley to rotate. My question is for the tiny section ...
24
votes
4answers
3k views

Would there be centrifugal force if I were alone in the universe? [duplicate]

When I'm rotating, I feel centrifugal force. But if I were the only one in the universe and rotating, wouldn't I just kinda be still (since I'm not rotating with respect to anything) or would there ...
11
votes
2answers
685 views

Why do tea leaves go to the center of the cup?

When I stir my tea with a spoon, I observe that the tea leaves all eventually concentrate in the center of the cup. Clearly they go against the centrifugal force. Why? Yet when I put the cup in the ...
0
votes
1answer
35 views

Why is the Earth not an exact sphere and what makes it bulge at the equator? [duplicate]

In chapter 7 of the Feynman Lectures Volume 1, Feynman explains that the Earth is round due to gravitation as everything attracts everything else. He also says that it is not an exact sphere since it ...
1
vote
1answer
39 views

Disparity in the equations of motion for a particle in a central field [duplicate]

Hello! I am considering the motion of particle in a central field and appear to derive inconsistent equations of motion when the Euler Lagrange equations are applied directly to (1) the Lagrangian $L(...
45
votes
8answers
11k views

How does tilting a bike make it turn sharper?

Note that my question is not why do you tilt your bike when on a curve. It's about the reduction in turning radius when one tilts the bike inwards. Short to-the-point answers are welcome.
-1
votes
1answer
41 views

The other force in centrifuge

Consider a rotating centrifuge and a reference frame rotating with it. On every "piece" of fluid inside a centrifuge acts centrifugal force, but what are the other forces that make every piece stay in ...
1
vote
2answers
117 views

What effect does gravity have on a spinning object? [closed]

If gravity was the only force present would gravity, beside pulling, also stop the rotation / spin of a small object its pulling towards it over time? What would be the effect on an uneven object and ...
0
votes
0answers
30 views

Apparent forces in a rotating reference system

In Lanczos Variational Principles of Mechanics there's a subsection for apparent forces in a rotating reference system. It states that If the origin O of the reference system is kept fixed, the ...
2
votes
5answers
278 views

If centrifugal force isn't real then why am I being pushed on a merry go rournd? [duplicate]

I just finished my class on circular acceleration and I learnt that centrifugal force (outward force) is a psuedo force. It doesn't really exist. Now suppose I am going round in my car or a merry go ...
-1
votes
1answer
69 views

Repulsive behavior of Newtonian gravitational theory?

I thought Newton gravitational theory of course is about attraction. but I saw the claim "the shorter distance (angular momentum)$^2$/$r^2$ repulsive behavior of Newtonian gravitational theory" in ...
-1
votes
1answer
61 views

How do we not feel the speed of rotation of Earth?

Many people say, we don't feel the speed because everything around us including the air moves with the same speed, but I am not satisfied with the explanation. If it was so, shouldn't we feel a huge ...
0
votes
1answer
108 views

Gravitron Physics vs Spinning a ball in a glass

I have experimented with trying to "lift" up a ball inside a glass by spinning it. It works with a wine glass in which the top is narrower than the bottom but not with a vertical glass (I've used ...
0
votes
1answer
58 views

Could there be a moon orbiting so fast that the centifugal force is greater than its own gravity?

Could there be a moon orbiting a massive planet so rapidly that the moon's own gravity is less than the сentrifugal force from the rotation? What would be the implications in such a system? Would the ...