Questions tagged [centrifugal-force]

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

Filter by
Sorted by
Tagged with
0
votes
1answer
39 views

Calculating the pressure in a rotating bucket [closed]

By the way, I am not quite convinced that the solution should be $\frac{1}{2}\rho\omega^2r^2$. I think it should be $\rho\omega^2r^2$. Appreciate any help.
0
votes
3answers
98 views

Centrifugal force in a non-inertial reference frame

There is something I don't quite undestand about the role the centrifugal term plays when describing motion in a non-inertial reference frame. In most Classical Mechanics books, you can find similar ...
1
vote
2answers
69 views

Why do we weigh less on equator when centrifugal force isn't a force at all? [duplicate]

Why would we weigh less on equator as the weighing machine measures the force by which we push ground and that should not change if are on equator or poles?
0
votes
1answer
45 views

Solar Oblateness: Understanding the force balance formula and solar radius in arcseconds

I have 2 questions regarding the following exam-style question and solution: Given a solar mass of $M_{\odot}=2.0 × 10^{30}\,$kg, a solar radius of $R_{\odot}=7.0 \times 10^8\,$m and a rotation ...
0
votes
2answers
82 views

Determine force of particle along trajectory [closed]

The problem: I have a trajectory in cartesian plane defined by points. A particle with mass $m$ runs through this trajectory, with a defined initial velocity. At every moment, there is a force $F$ ...
2
votes
1answer
161 views

What happens when one uses a blender in zero gravity?

I was recently told by a friend that using a blender type apparatus in a zero gravity environment will act like a centrifuge instead mixing properly. Is this the case? Furthermore, can anyone provide ...
0
votes
0answers
17 views

Baseball In an O'Neil Cylinder

I am trying to understand the physics of a baseball game in a rotating spacecraft such as the O'Neil cylinder seen in the movie Interstellar. Imagine a cylindrical spacecraft of radius $R$ rotating ...
1
vote
0answers
35 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
1answer
83 views

What exactly causes particles to drift toward the bottom of a tube in a centrifuge?

As I understand, centrifuges can effectively create gravitational fields that are a thousand times stronger than the Earth's. And it is this pseudo-gravitational force that causes particles to sink ...
36
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 ...
3
votes
3answers
135 views

How is Gravity created in opposite to centrifugal force?

Wikipedia points out that Gravity is: most accurately described by the general theory of relativity (proposed by Albert Einstein in 1915) which describes gravity not as a force, but as a ...
0
votes
0answers
28 views

What are the effects of centrifugal and Coriolis forces on an object moving in a rotating reference frame?

In a rotating reference frame, we usually come across the following two pseudo forces: Centrifugal force: $f_\mathscr{centrifugal}=-m\omega\times\omega\times r$ Coriolis force: $f_\mathscr{coriolis}=...
1
vote
1answer
33 views

Roche lobes in binary star systems

While studying mass transfer in binary star systems, I came across the concept of Roche lobes and the role of the inner Lagrangian point $L_1$, as shown in the adjoining figure. However, I am having ...
14
votes
4answers
112k views

Why is Earth's gravity stronger at the poles?

Many sources state that the Earth's gravity is stronger at the poles than the equator for two reasons: The centrifugal "force" cancels out the gravitational force minimally, more so at the equator ...
3
votes
7answers
90 views

Clarification on circular motion and pseudo-forces [duplicate]

The way i interpret pseudo-forces is that its a mathematical correction that makes the conclusion of the observer in an accelerated frame correct. And I also believe that this "pseudo-force" has no ...
0
votes
1answer
45 views

Artificial gravity on free falling objects

Assume the following scenario: -two objects in constant velocity free fall side by side to each other (imagine two astronauts in orbit) -one of the two astronauts is inside a non rotating ring ...
0
votes
3answers
106 views

Centripetal and Centrifugal acceleration/force [duplicate]

Centripetal force acts towards the centre and necessary to keep an object in circular motion. But centrifugal force is equal to the magnitude of centripetal force and acts in outwards direction and ...
0
votes
1answer
231 views

Water in a glass on a rotating disc

You put a glass of water on a record turntable and begin slowly increasing the speed. What happens first - does the glass slide off, tip over, or does the water splash out. I am particularly ...
0
votes
2answers
40 views

Advisory speed limits on turns

I was just thinking about why many corners have advisory speed limits that are less than the highway speed limit, does it have to do with centripetal acceleration?
1
vote
4answers
89 views

If I kept a body in a groove on a frictionless circular table, and rotate the table with a constant angular velocity, what will happen to the block? [duplicate]

I have read that it would slide off the table, because apparently in the frame of the table it experiences a centrifugal force outwards, but I can't seem to agree with that logic. In the ground frame ...
6
votes
7answers
2k views

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

If some object is kept in a radial 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....
3
votes
5answers
144 views

Where do we see centrifugal acceleration?

A body in circular motion always possesses centripetal acceleration which is felt by a person sitting at the center of mass. It will not be felt by a person viewing the motion from the ground frame. ...
0
votes
0answers
20 views

Bicycles are also balanced by gyroscopic effects, right? [duplicate]

I think that the wheels of a bicycle are rotating when it is moving forward, so there must be gyroscopic effect, so the bicycle is balanced by gyroscopic effect to some extent, right?
4
votes
2answers
8k views

Fictitious forces confusion

I have a hard time understanding the subject of fictitious forces. Let's discuss a few examples: 1) I'm sitting inside a vehicle which is accelerating in a straight line. I feel like someone is ...
0
votes
1answer
20 views

Can opposing centripetal forces help us play catch in a space station?

Let's say we are inside a wheel in our brand-new space station, which spins to simulate gravity, using the centrifugal force. We decide to celebrate our ground-breaking success by play catch in space. ...
1
vote
1answer
32 views

Pressure at depth $h$ of a spinning bucket at top of swing

This was a question posed to me some time ago and it has haunted me ever since. Hints and suggestions would be awesome. Say someone is spinning a bucket of water in a vertical circle of radius $r$ ...
2
votes
2answers
115 views

Potential for a general fictitious force?

In a general non inertial system four fictitious forces arise: Coriolis Force, centrifugal Force, azimuthal Force, "translational" Force (due to linear acceleration of the origin of the system) I ...
0
votes
2answers
46 views

Why $g$-force increase with radius and centrifugal force decreases? [duplicate]

Trying to understand the 2 formulas and the relations between radius. Common sense will tell me that centrifugal force increases while we are on a curve with a short angle , as newtons law formula ...
0
votes
1answer
668 views

Tension in horizontal circular motion of a non-uniform object (friction negligible)

A rod of total mass $M$ and length $x$ has its tip attached to a string of negligible mass, so it spins in a circular motion horizontally free from friction with constant tangential velocity. I have ...
0
votes
1answer
45 views

Is Upside-down Racing Possible?

Based on the calculations I have done, upside-down racing seems to be possible. But in my mind, and certainly others too, it seems outlandish and impossible. Here is what I have come up with, please ...
0
votes
0answers
17 views

Y the relation among centripetal, centrifugal and gravitational force exerred on the moon is different from an object on the earth surface?

I read that since the earth vid rotating on its axis ,an object on the earth surface experiences a centrifugal force because the object is also moving around the earth's axis.So,that centrifugal force ...
2
votes
1answer
223 views

Quantum mechanical origin of pseudo forces

I am thinking about this from quite some time but could not come up with any satisfactory explanation. In a nutshell, how would one explain the pseudo forces felt by non-inertial observers given that ...
9
votes
2answers
702 views

Is the Olympic running race fair? [closed]

I noticed that the 200-meter sprints are conducted on curved tracks. (See this video: world championship semifinals 2009) Isn't that weird? I mean, just look at the curvatures of each lane! (Source)...
2
votes
1answer
55 views

Reducing the degrees of freedom of a Lagrangian in a spherical potential by using integrals of motion [duplicate]

I'm sure I've made a silly mistake here, so I would be very grateful if someone could help me clear it up! Here is my reasoning: The Lagrangian in a spherical potential is $$ \mathcal{L}=\frac{m\...
73
votes
10answers
61k views

Does centrifugal force exist?

Currently in my last year of high school, and I have always been told that centrifugal force does not exist by my physics teachers. Today my girlfriend in the year below asked me what centrifugal ...
6
votes
1answer
319 views

How are the Lagrange points determined?

According to Hyper Physics, there are 5 equilibrium, or Lagrange points of the Earth-Moon system and only 2 of them are said to represent stable equilibrium points. This made me think if there is an ...
0
votes
0answers
40 views

How to beat speed of light using graphene pulley motor? [duplicate]

A 10 meter graphene pulley with 10,000 teeth, attached to a second graphene pulley of 10mm with 10 teeth both in a low temperature vacuum chamber. The first graphene pulley is being rotated by a ...
11
votes
8answers
4k views

If an object moving in a circle experiences centripetal force, then doesn't it also experience centrifugal force, because of Newton's third law?

When an object moves in a circle, there's an acceleration towards the center of the circle, the centripetal acceleration, which also gives us the centrifugal force (since $F = ma$ is the equation for ...
8
votes
4answers
10k views

Shape of water in rotating bucket

I need to show that the surface of water in a bucket rotating with constant angular velocity will have parabolic shape. I'm quite confused by this problem, but here's what I did: $$\vec{F}_{cf} + \...
1
vote
2answers
270 views

Why do we only feel the centrifugal force?

After spending some time researching about the centrifugal force, I now understand that it is needed in a non-inertial reference frame for Newton's Laws to hold true. However, I don't understand why ...
0
votes
2answers
34 views

What happens to net acceleration in a non-inertial reference frame with cenripetal force?

In a non-inertial reference frame, the centripetal force is balanced by a centrifugal force. Therefore, shouldn't the net acceleration be zero? Yet, you still feel an acceleration outwards? Why is ...
1
vote
1answer
162 views

Centrifugal force in effective potential [closed]

$$E = \frac { 1 } { 2 } m v _ { r } ^ { 2 } + \frac { L ^ { 2 } } { 2 m r ^ { 2 } } + U ( r ).$$ This is the formula of total energy of an object with mass $m$ orbiting an assumed stationary body of ...
2
votes
3answers
97 views

Why do we feel a force in circular motion?

I'm wondering why we only feel the centrifugal force in a circular motion. I did look at Why do we only feel the centrifugal force? question which is exactly that, but I'm not really satisfied with ...
-1
votes
2answers
77 views

When is the centripetal force the biggest? [closed]

In a circle motion, where two objects have the same orbital times, but different radius, which one will have the biggest centripetal/centrifugal force? The outer or the inner one?
1
vote
2answers
85 views

Why do vehicles executing circular motion tend to over turn outwards and not inwards?

I understand that when systems are executing circular motion the resultant force acting on the system (centripetal force) acts towards the centre of the circle. However, if a vehicle should over turn ...
1
vote
2answers
89 views

Rotating rope with a ring

I have this ideal system. There is a bar with negligible mass and a ring(a point) with mass $m$. Bar is rotating with angular speed $\omega$. If I see that system from Non-inertial reference system I ...
1
vote
1answer
60 views

Why people feel outward force in rotor ride?

I know centrifugal is fictious force but what is possible reason for the force that people feel in rotor ride outwards. The reason for people not falling down is friction force which is in vertical ...
0
votes
3answers
52 views

Will there be any radial velocity in absence of centripetal force and angular acceleration?

In the question it is stated that there is a ring which can move along a smooth rod. The rod itself is rotating in a horizontal plane with one fixed end with uniform angular velocity. Initially the ...
0
votes
0answers
64 views

Weight at Poles and Equator Wrong?

Recently, I was thinking about the acceleration due to gravity on Earth when I remembered that I was taught that you weigh less at the equator because a fictitious centrifugal force "throws" you off ...
0
votes
2answers
38 views

Could an electric centrifugal fan in space be used to propel a substance to create force?

Would an electric centrifugal-force fan (like that found in a blower motor) work in space to create force, by putting a substance (like silica sand or something slippery) through the centrifugal fan ...