Centrifugal force Definition and 204 Threads

I think that there is no such thing as centrifugal force . Am I right ? is this force fictitious ?

In lecture 5 of MIT's OCW 8.01 , Prof. Lewin says that when you're in in uniform circular motion, the perceived gravity is always in the opposite direction as the push or pull (so if you're holding onto the end of a rope that's being spun around horziontally, the rope is pulling on you and you...

Hello, the problem I am working on is: "A puck of mass m = 51.0 g is attached to a taut cord passing through a small hole in a frictionless, horizontal surface (see figure below). The puck is initially orbiting with speed v_i = 1.30 m/s in a circle of radius r_i = 0.310 m. The cord is then...

I'm learning about mechanics in noninertial frames and I'd like to clarify the apparent centrifugal force. To set things straight, Centrifugal force = Fcf = m(Ω×r)×Ω where Ω×r is the instaneous velocity at a point on the outside of a circle (or other rotating path) and Ω is the...

In physics today, my teacher told me that Centrifugal force is a fake force? Is this true? What exactly is Centrifugal force? Any help would be greatly appreciated!

Hi, thank you for reading this topic. This is something that really bothers me...First of all let me say that I know what the terms centripetal and centrifugal stand for. What's the problem then? The problem is that I've always read that the centripetal force is an actual force and that...

Would you feel more centrifugal force going around a small radius curve or a large radius curve going at constant speed? Why?

Homework Statement The friction coefficient between the tires and the road is 0.6. What is the maximum velocity of the car without it sliding out of the turn. The radius of the curve is 80m. The curve is considered to be horizontal (as ridiculous as it may sound)Homework Equations F = ma The...

Homework Statement The first problem I am having trouble with is as follows: A child pushes a 40kg sled across the ice at a constant speed. If μk = 0.05 calculate the force applied to the sled. Homework Equations I know that f=\muFN The Attempt at a Solution I know that the...

hi i found the following equation that a spring(with constant k) , a mass m rotating with angular velocity ω, will have a constant angle \alpha to the vertical axis that is given by cos(\alpha)=\frac{g}{\omega^2 l}(1-\frac{m \omega^2}{k}) this looks similar to something like...

1. I'm in my first year of physics, and the end-of-year project is a bit of a doozy: find two examples of misapplied physics in movies and explain how it's wrong. For my first example, I chose a scene from the movie "The Iron Giant," in which the Giant picks up a car with Hogarth, our child...

What are the consequences of the explosion of a steel wheel by the action of centrifugal force and spinning at high speed? Am I creating the energy of this explosion?

hi i was wondering why rockets always start upright, as if they would start in a position parallel to the surface of the earth(or at least almost parallel to the earth, but at the equator this should not be such a problem, if there are no mountains or anything else close to the point where...

"Centrifugal force" Homework Statement A smooth horizontal tube of length l rotates about a vertical axis. A particle placed at the extreme end of the tube is projected towards O(axis) with a velocity lω while at the same time the tube rotates about the axis with constant angular speed ω...

I don't understand how its a fictitious force and why you need to be in the rotating frame of reference to observe it? In the example of the moon and the Earth and its tides. You have the centripetal force causing the tides to increase at the point where the Earth is facing the moon and the...

Homework Statement Hi, I am confused about the relationship between the centrifugal force and radius. The centrifugal force equation for an object having constant mass and angular velocity moving around the Earth on GRS80 reference is Fc = m w^2/r (m=mass, w^2=angular velocity of the...

I just read that Centrifugal Force is a false force. It does not exist. Inertia (which is not a force) is mistakenly called Centrifugal force. Now, here is my question According to Newton's 3rd law of motion, forces always exist in pairs; action and reaction. Centripetal force which is the...

Influence of "Centrifugal" force in 'g' Hello everyone, I was wondering one of these days if the 'centrifugal' force due to the rotation of the Earth in the Equator could cause any difference in the value of the gravitational acceleration; namely it would be supposedly less than the real...

I understand the equivalence of gravity and uniform linear acceleration. But I'm less clear on the example involving circular motion (merry-go-round) and the equivalence of gravity and centrifugal force, because I'm unclear about the connections between SR & GR. The example does illuminate...

Hey folks, I just wonder how you guys think about this. Assume that there is a spring pendulum rotating at hinge (Free swing or forced swing). In this case, can I calculate force transmissibility (transmitted force amplitude to ground via spring devided by centrifugal force amplitude) ...

If you've ever taken a bicycle wheel off, held it with both hands on either side of the axle and try to lean it side to side whilst the wheel is spinning it is very difficult, the wheel fights you and it's almost like the wheel wants to 'tip' about 90 degrees before or after (I can't...

In circular motion why the centripetal and centrifugal not get cancelling. .?

I came across this http://en.wikipedia.org/wiki/Reactive_centrifugal_force" I think this is Wikipedia nonsense. There is only one centrifugal "force" and it is the inertial effect or "pseudo force" or "fictitious force" observed in a non-inertial frame of reference. The authors of these...

we wouldn't experience the centrifugal force unless we change direction. Suppose we are flying an twin engine airplane and one side engine fails, to counteract this the pilot applies opposite rudder and flies straight. Would we experience the centrifugal force and does the turn indicator...

Please correct me if I am wrong in any of this 1) Electrons are able to go around the nucleus of an atom due to the centrifugal force resulting from the weak/strong force (one of them) 2) Quantum physics says that particles can be in 2 places at the same time. 3) Therefore can't an electron...

Homework Statement 10 lbs. steel wheel with its center of gravity at 6 inches from the axle rotating within a circular frame at 7200 rpm Homework Equations 10lbs. x 6 inches x 72002rpms x 0.000028416(constant) = 88,385 lbs. The Attempt at a Solution 10 x 6 x 72002 x 0.000028416...

Hello, I'm designing for a rotating swivel assembly that will be used for a high pressure cutting system. The rotary swivel is set for an allowable 2800 bar of pressure but has to rotate at 300 RPM while allowing a pressure of 12-15,000 psi pass through it. My question consists of two...

What formula would one use to determine the centrifugal force at the tip of a rotor of 35ft diameter, rotating at 392rpm? Would any other factors be necessary, such as blade thickness, weight, etc? A pilot I work with doesn't believe the weight at the rotor tip would be measured in tons. I...

simple centrifugal force problem please help i have a 2m long tube spinning around its center at w=1 theres a 1 kg projectile at 1 m distance from the axe inside the tube that is released at a certain moment what speed does the projectile have when it leaves the tube? please show me...

Hello. I am in need of some assistance regarding a theoratical problem I have. It goes something like this: Imagine a vertically placed axle, rotating at a constant angular velocity (omega). From the middle of this axle extends an arm and on the edge of that arm is a unit containing...

Homework Statement In order for a satellite to move in a stable circular orbit of radius 6736 km at a constant speed, its centripetal acceleration must be inversely proportional to the square of the radius r of the orbit. What is the speed of the satellite? The universal gravitational constant...

I am trying to understand how centrifugal force works when applied to a train. For example, if I had a train that had zero super elevation, was traveling along a curve, of some radius at some speed then the centrifugal force acting on the train would be of a certain magnitude which would act...

Hello I was wondering if centrifugal force had a gradient, what i mean by this is this:- A train is traveling on a straight section of track with no centrifugal force. The train then travels along a transition, as the train travels along the transition, the centrifugal force builds up...

Homework Statement I have this exercise which says: An airplane moves along a circular path of 150 meters radius, contained in a vertical plane with constant speed module 200km / h. a)Determine the force resulting from the interaction between the seat and the pilot, whose mass is 80kg, at...

Hi, my math and physics are poor so please bear with me. I have an bifurcated asteroid - 2 components. A sphere diameter 1.5km (m1) and a larger sphere, 2km in diameter (m2). The spheres are touching. System spins around the long axis. Assuming both bodies have internal strength (not...

Homework Statement Basically, this is the problem. [PLAIN]http://img180.imageshack.us/img180/3598/physicsproblem.png It's related to some design research I'm doing regarding a centrifugal control valve. This is a type of valve that controls the fluid flow based on the centrifugal...

Hello everyone, Ok so I read that the reason they are in free fall is because they are going in a circle like this , and the Earth curves away from them at the same time or something, could anyone explain it to me simply. Also why don't astraunauts get pushed to the periphery of the...

Hi! Can someone explain this expression for the centrifugal force? F = -mw x w x r, where the underline refers to vectors. (sorry for notation) w is the angular veolcity, m mass, a r is the radial vector. I can't really see where the expression comes from. Can you indentify and...

what is pseudo force and centrifugal force? can anyone differentiate between them? is one a special case of the other?

I found this on Wikipedia for the equation relating to centrifugal force. F = d/dt (m*v) So I have my mass and velocity but I just multiplied the two, that can't be correct can it. You have to derive something I imagine. Also would the units just be in lbs or Newtons. I'm using feet/s...

Hi, I've read about the balancing of rotating masses. In the context every author(even J.E.Shigley in his book Theory of machines & mechanisms) mentions that a rigid body while rotating, it experiences a "Centrifugal Force" . Now we know that centrifugal force is a pseudo force when we analyze...

Say the force is 1g for an object rotating around an axis. If the object is a platform that is facing the center how would forces act on an item placed at different areas on the platform? Thanks.

Helium balloon "centrifugal" force Homework Statement Assume that you are driving down a straight road at a constant speed. A helium-filled balloon is tied to a string that is pinned to the front seat. Which way will the balloon swing when you apply the brakes? Explain why. Homework...

Is there any relation of gravity with centrifugal force & gyroscopic effect? Rotating body shows centrifugal force due to radial acceleration α=rω2. This causes force just like gravitation force. Rotating gyroscope doesn’t fall & maintain motion. This is just like anti-Gravity. Can I say that...

Suppose we have a merry-go-round of radius 10 meters. There's a thin glass tube with cross-sectional density d going radially from the center of the merry-go-round to the edge. In the glass tube one meter away from the center, there's a marble of mass m. The merry-go-round completes one...

Reading the Arthur C. Clarke novel: "Rendezvous with Rama"; something keeps nagging me about the descriptions of their experience inside the ship they encounter, which is a huge, rotating, hollow cylinder. It's rotation makes a sort of "pseudo-gravity" by way of centrifugal force. The issue I'm...

Calculate the centrifugal acceleration associated with a.) The rotation of the Earth around its axis, as measured on the equator b.) The Earth moving around the Earth-Sun centre of mass. Assume the orbit is circular c._ The Sun moving around the Earth-Sun centre of mass. Same assumption as...

How do these machines work? I mean there is no such thing called centrifugal force in real yeah. It is basically inertia. So can anyone tell me how it can be used to separate molecules and how different masses move differently. I haven't see the machine yet so if you can explain that would be...

Um, I suppose this is very basic but I just got kind of confused. Okay suppose you are standing and swinging a rope with a mass attached to its end, so that the circular trajectory of the mass at the end of the rope lies in a vertical plane. And suppose you are stood on a weighing scale. Does...

Hi, What happens to the fluid in a cylinder that is spinned around it's central axis? Would it matter if there would be a bit of air? Thanks very much, Alex