Questions tagged [centrifugal-force]

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Contradiction in my Lagrangian mechanics problem [duplicate]

The Lagrangian for a particle of mass $m$ in a potential well $V(r)$ is given by $$ L = \frac{1}{2}m(\dot{r}^2 +r^2\dot{\theta}^2) - V(r). $$ Working though the Euler-Lagrange equation I get $$\...
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1answer
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Effect of Latitude /rotation of Earth on g

Okay,I am having a little problem in understanding the effect of latitude/rotation of Earth on g. In this figure, the test mass,m at place P experiences Centrifugal Force, Fcf acting outwards. As ...
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2answers
194 views

Gravitational/centrifugal effects felt in a space elevator

I understand that a space elevator should be at least as long as a geosynchronous orbit (22,236 mi), because only beyond that is the centrifugal force from the Earth's rotation is greater than the ...
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2answers
169 views

Artificial gravity through centrifugal force while traveling very fast in vacuum

So, if you've ever read a sci-fi book you've seen it before probably: a ship like "babylon 5" (or the ship in "2001 A space odyssey" ) which rotates and creates artificial "gravity" by using ...
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1answer
73 views

Would the centrifugal effect of the Earth orbiting around the sun cause the weight of an object to change?

If you weighed an object at mid day and then again at midnight, would the objects weight change ( ever so slightly ) due to the centrifugal effect of the earth travelling around the sun ? What I am ...
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1answer
302 views

Centrifugal force intuitive explanation [duplicate]

I would like to know if centrifugal force is only apparent why all the objects in a washing macchine are pressed against the "wall"? I can experience the effects of the centrifugal force even if I am ...
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1answer
349 views

Centrifugal force and centrifugal pump

A rotating stone flys off tangentially when we cut the string and not radially. So how does centrifugal force "throw" the fluid outward (i.e radially) in case of centrifugal pumps? Also please explain ...
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2answers
644 views

Why does a marble in a merry-go-round move towards the edge? [duplicate]

When the marble is viewed from with respect to the ground, it experiences a net inward acceleration, and hence force. However, when the marble is displaced slightly, it moves towards the edge. Why? My ...
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1answer
54 views

How does the force change with distance in a centrifuge?

If there are two centrifuges spinning at the same speed but one has twice the radius of the other, the contents of which centrifuge will be forced against the outside wall the most? Or to paraphrase,...
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1answer
80 views

Why does the clothes leave water when twisted or swirled?

When we wash clothes and are drying them why we swirl or twist them to remove water i mean anything could have happened but the water leaves out of the cloth.
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1answer
381 views

Difference between Motorcycle and road bike max lean angle

I've wondered why motorcycles can lean harder into turns than road bikes. I've went through the formulas and the only different variable I've found was tire traction. Is that really so? To me it does ...
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1answer
254 views

How is Centripetal Force related to rotation about one of the Principal Axes of Inertia of a rigid body? [closed]

Here I have understood the solution but just have a doubt regarding the last question about the vector force at B. The solution says that as the y axis is a principal axis of inertia,so rotation ...
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2answers
2k views

Centrifugal force on a merry-go-round

I'm having trouble understanding centrifugal force, so I would be glad if someone could explain it to me. From what I've read, centrifugal force is a fictitious force, directed radially outwards, ...
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1answer
267 views

Artificial gravity in a spinning space station

I have a question about artificial gravity in a spinning space station. From astro.cornell.edu: In space, it is possible to create "artificial gravity" by spinning your spacecraft or space station....
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4answers
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Why do non-rigid bodies try to increase their moment of inertia?

I have oft noticed that a non-rigid body on being rotated tries to increase its moment of inertia. Is there any way we can prove this in a logical and mathematical fashion?
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1answer
110 views

What mass distribution around a huge rotating cylinder would a person (who can't see the outside) at rest on the inner side of the cylinder infer?

In a rotating frame, the artificial gravity has a peculiar form. At the center, this "gravity" is zero, while it's increasing in proportion to $R^2$, where $R$ is the distance to the center. Now ...
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1answer
103 views

Why does stress decrease as you move away from the rotational center?

A while ago Real Engineering posted a video "Can we create artificial gravity". During the video he states that the designers of Elysium took note of the centrifugal and centripetal forces acting on ...
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1answer
76 views

Would an object floating in a spinning cylinder in empty space be pushed toward the wall of the cylinder? [duplicate]

This is a rather simple question, but it intrigues me nonetheless... If there was a ball in a hollow cylinder that was spinning (on an axis) in empty space (no noticeable gravitational effects), and ...
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5answers
2k views

Why doesn't a rotating object feel the centrifugal force in the tangential direction?

Consider a slingshot in two reference frames : 1) The ball (rotating) 2) Me (inertial) In my frame, tension acts as centripetal force necessary for the circular motion, and I see the inertia makes ...
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7answers
3k views

Why is centrifugal force called a 'pseudo'-force? Give descriptive answer please (not many equations)

I am an Honours student but still I don't understand this. I mean, how can a force be called 'pseudo' when we can really feel it? For example, while we are on a merry-go-round, we all feel a force ...
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3answers
403 views

Effective potential of a two-body system

This question is with regards to a two body system consisting of two masses that interact via a conservative central force. In polar coordinates, the Lagrangian can be written as $$\frac{1}{2}M\dot{...
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2answers
155 views

Necessity of increasing pressure fluid to pump up water

The volute casing in the centrifugal reduces the velocity as the fluid flows through it, there by in increasing the pressure , So my question is Why is high pressure and low velocity necessary to ...
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3answers
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Why does a laboratory centrifuge cause heavier particles to go to the bottom of the tube?

From what I have read online, I can understand that there is a "centrifugal force" that pushes the heavier objects away from the center, but I cannot understand why. I asked my teacher and she told ...
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1answer
811 views

Is centrifugal force a conservative force?

The centrifugal force depends on the position so it must be a conservative force whereas the Coriolis force depends on the velocity and it is a non-conservative force. Is this conclusion correct?
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3answers
821 views

Why horse rides in a merry-go-round swing outward?

In a circular motion, like the horse rides in a merry-go-round, there is only one force that acting on it, the centripetal force that pulls the ride inward. I'm struggling to answer why the horse ...
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1answer
114 views

Shape of a spinning chain

A length of chain (or massive string; negligible thickness; non-stretching, no rigidity, but non-negligible mass), possessing uniformly distributed mass, attached to a vertical spinning shaft by one ...
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3answers
4k views

Why people lean right/left when turning left/right

My dad was driving in a highway, when we leave the highway there is a banked road. When car turning right, my body is leaning to the left. I thought my body will lean to the center due to centripetal ...
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2answers
635 views

Why aren't we more heavier at midnight than at noon on the earth's surface? [duplicate]

At noon the sun and the earth pull the objects on the earth's surface in opposite directions. At midnight, the sun and the earth pull these objects in same direction. Is the weight of an object, as ...
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5answers
588 views

Why do we not feel weightless at equator but feel in satellite

A person living in his house at the equator goes in a circular orbit of radius equal to the radius of the earth. My question is, why does he/she not feel weightless as a satellite passenger does? If ...
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1answer
97 views

Centrifugal force in inertial systems

My textbook gives an example: There are two systems, $O$ is inertial and $O'$ non inertial. $O'$ is rotating whit $\omega=\mathrm{constant}$ and $O=O'$. We assume that a disc is rotating whit the ...
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3answers
416 views

Would it be possible to walk up a wall under right circumstances?

For example, you are in a box that is connected a distance $R$ from a clockwise spinning centre. If I understand correctly, the spinning box is a result of the resulting centrifugal force $F_{...
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4answers
555 views

How does centrifugal force resemble gravity? [duplicate]

Someday we may build a rotating space station with the centrifugal force providing an artificial gravity. (Also answer the title question)
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3answers
1k views

Intuition $\neq$ Diagram: Weight on North Pole vs Equator

This is a common physics exercise: Suppose the earth is a sphere of radius $6370$ km. If a person stood on a scale at the north pole and observed the scale reading (his weight) to be $mg$, what ...
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0answers
141 views

If rock is melted and put in a centrifuge at high temperature, will the component chemicals separate?

Consider if you were on the Moon and did these steps: heat some lunar soil to well above its melting temperature put it in a suitable container on a centrifuge and spin it enough to overcome the ...
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1answer
225 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 ...
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1answer
698 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 ...
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0answers
31 views

If Earth spun faster, would I be able to jump higher? [duplicate]

I'm asking mostly in relation to the forces acting on a person, but it would also be nice to know if there would be any impact on muscle strength, similar to when an astronaut goes into space.
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7answers
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If the ground's normal force cancels gravity, how does a person keep rotating with the Earth?

When I am on earth, the weight of my body is countered by the reaction of the ground. So, there is no net force acting on me. But I am spinning with earth. But if there is no centripetal force then ...
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0answers
64 views

How can we explain Saturn's non-spherical shape in terms of forces? [duplicate]

As we know the Saturn's shape is not spherical. In fact, its polar radius is almost 10% smaller than equatorial radius. This flattening is caused by the rapid rotation of this planet. Image credit: ...
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4answers
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Which force is required by a satellite revolving around the earth?

Since centripetal force is the inward force required to keep an object moving with a constant speed in circular path and centrifugal force is the apparent force that pulls an object from its centre or ...
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2answers
817 views

What limits the top speed in curves?

I was asking myself how it would be possible to set new top speeds on racetracks. I came to the conviction that on most tracks not the vehicle with the highest top speed have the fastest laptime. ...
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4answers
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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} + \...
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1answer
76 views

Artificial gravity in spinning space station, suspended frame of reference

If I'm inside spinning space station designed to create artificial gravity (and the station is a vacuum, so no air resistance), but I'm suspended, not touching any wall, with the same directional ...
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2answers
369 views

Centrifugal and Coriolis Forces

I understand the theory that a ball thrown from the equator to the Tropic of Capricorn will experience a forward + sideways motion (as the earth spins at approx 444 meters per second at the equator). ...
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2answers
250 views

Centrifugal Force in a Space Station [closed]

An argument has been made that if a space station in deep space where it is not affected by any significant gravity from nearby heavenly bodies could exert enough centrifugal force to simulate gravity ...
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1answer
847 views

Bug on a rotating plate problem [closed]

A bug is on the edge of a rotating plate, rotating with angular velocity 0.2 rad/s. The bug decides to move towards the centre of the disc, and moves with a velocity v0=0.1m/s from its point of view. ...
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2answers
230 views

Can we feel weightless if Earth's angular velocity is big enough? [duplicate]

According to Fn=Fg-Fc , if earth's angular velocity is big enough to make Fc equal to Fg, would we feel weightless? I did some basic calculation earth has to rotate at 1 rev/5064s at equator for Fc to ...
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3answers
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Why are the Lagrangian points $L_1$, $L_2$ & $L_3$ unstable?

Why are the Lagrangian points $L_1$, $L_2$ & $L_3$ unstable? I am doing a physics presentation in front of my class and I am just confirming this is correct, and if it isn't, could somebody ...
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2answers
276 views

Skipping-rope in space

On a space station a person wants to play skipping-rope. Although they cannot jump, they turn the rope at a constant angular velocity. What would the shape of the skipping rope be, and could we set ...
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6answers
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Would you feel Centrifugal Force without Friction?

This question arose from my sci-fi discussions with my friend. It concerns artificial gravity through centrifugal Force. Partly inspired by the Artificial Gravity created on the Hermes ship from the ...

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