Centrifugal Definition and 344 Threads

Is it 'possible' (that is, if you say not, can you conclusively show the negative), that the entire observed acceleration in the expansion Our Universe, created some 13.7 x 10^9 years ago in the Big Bang, is due solely to centripetal force throughout, caused by a complex...

If the walls of a submarine were supported by fast-spinning rings, using centrifugal force to prevent collapse or buckling, would this be viable engineering? I am assuming that the rings would be magnetically suspended to eliminate friction. This also seems like a self-stabilizing system with...

PeterDonis submitted a new PF Insights post Centrifugal Force Reversal Near A Black Hole Continue reading the Original PF Insights Post.

So I was doing a research paper on the differences of gravity at various places on the Earth, and I found a few sites and videos that tried to explain that a centrifugal force caused by the Earth's rotation was a cause for the disparity in gravitational acceleration at various places on the...

As the potter shapes the mud vessel on his wheel, the wheel applies centrifugal force on the clay.So against this centrifugal force the potter shapes the vessel. Could this be an example of centrifugal force?

Alright everyone, I know this is a huge question, but I've done enough homework to at least have informed ignorance on the subject. I posted a similar topic here, but that question was more conceptual and this definitely is much more of an applied use question. (Edit: I realize that the above...

Is anyone interested in telling me the force created from 2 propeller blades rotating 2000 rpm.The total diameter of the prop is 72 inches and the weight of 1 blade is 4 lbs. Reason for the question is I want to mill a clark-y profile the length of the blade less ,4 inches for a bolted...

Little bit of a disclaimer: if you take a look at my first (introductory) post, you'll see that I'm working towards aerospace engineering; therefore, this is leaning towards turbopump design, but for the time being I'll start out slow. Basically, I'd like it if anyone could help me get a sense...

Well the question says it all. On several websites I have found main 2 categories of pumps for air - diaphragm pumps for water - centrifugal pumps Why are centrifugal pumps not used generally for air applications?

First, may I apologize in advance if this question is in the wrong section of the forums. Given a cloud of mixed gasses and rocky material, how is spin created when a star is born? I will also give the cloud of gas a random order of movement prior to star formation. Can the physics for the...

Hi everyone, this is my first thread i hope i do it right. I will get right into it by saying, how can i prove that : w=w0*(1±4πƒv/g) Where "w" is the weight of an object moving along the ecuador, v is it's velocity and g is the gravitational acceleration. I have...

Hi! So I learned Newtons Law of Gravity and used the numbers to calculate that the acceleration due to the attraction between masses is 9.8m/s/s. Hooray! This is what I've learned is the acceleration due to gravity. However, does the rotation of the Earth and the subsequent centrifugal force...

Is there any centrifugal force acting on fine particles suspended in water inside centrifuge tubes? explain, not only by textual discussion

HI. I've read a lot of posts on centrifugal and centripetal force in space. But they mostly refer to the spinning space stations. I would like to know what happens when you take a motor with an axle and a mass on the end on of the axle, and you start the motor up.. I understand the whole law...

We know that the Earth is rotating, and its gravitational force is the centripetal force. So if I'm standing on the Earth, I'll feel 3 forces: Gravitational force, normal force and centrifugal force. However, the magnitude of the centrifugal force is equal to the gravitational force, so wouldn't...

SPOILER ALERT: This question will refer to, and may have spoilers, regarding Arthur C Clarke's Rendezvous with Rama. Read below at your own peril. BTW the book is totally worth reading. In the book, the astronauts basically encounter an immensely large cylinder, rotating along its long axis...

Homework Statement A centrifugal pump is used to pump water from one tank to another through 1000 equivalent ft of 4 in. schedule 40 steel pipe as shown in the figure. The second tank is located 25 ft above the first. Show that the pressure drop (in psi) in the pipeline between 2 and 3 is...

Hi, I am kind of confused about how a centrifugal force works. Every where i search there seems to be 2 opinions, that centrifugal force is indeed a force and others that argue that it is not. What I want to understand is in (for example) a centrifuge, which rotates very quickly with a test...

When an object, orbiting in circular path, experiences the sensation of being thrown outward away from the of circle. We often think that an outward force or centrifugal force is responsible for this trend. But it is wrong idea. Inertia is responsible for this. Since Earth rotates around its...

How exactly does the centrifugal force work? What causes it? Why is it considered a fictous force?

what is the cause of the centrifugal force from the perspective of the rotating observer? Also is rotation relative like linear motion?

Suppose we launch two ships and move them close to the Sun. They have solar collectors and can absorb a massive amount of energy thanks to their proximity to the Sun. The ships are connected by a 1000 meter long rod of titanium, and each ship's rocket is position opposite the other's, so that...

1. So the loop is known to be 12m in diameter (6m radius). Assume the car weighs 1250kg - how fast must the car go to clear the loop, and what will be its max G-forces endured? This was the question, which I have broken into 3 sections: a) Velocity at top of loop (done) b) Velocity at start of...

Hello I am making a vibration project which requires me to mount eccentric weights on both sides of an electric motor. I must submit the "generated force(in Kg)" by this motor.The RPM of motor = 1000 Total weight on both sides of the motor = 16.8Kg (8.4Kg on both sides) The radius(distance from...

1. The problem statement & given/known data A neutron star is a collection of neutrons bound together by their mutual gravitation. The density of such a star is comparable to that of an atomic nucleus (10^17 kg/m^3). a) Assuming the neutron star to be spherical in shape and of uniform mass...

i'm not really a phycisist and to be really sincere i usually cannot answear my questions in class... so yeah, a question i have for a long time now is, which force anulates the gravity preventing a rock tied on a rope spinning over my head to fall and just stay fixed in his horizontal axis, the...

When we release a suspended object, we recover the potential energy due to gravity as the object travels back through the height raised. When we release an extended spring, we recover the potential energy as the object travels back through the distance stretched. But when we release a rotating...

Hi all, I am relatively new to compressor theory and I am looking for a good explanation as to how volumetric flow affects pressure ratio between the stages within a centrifugal compressor. My current knowledge is that as volumetric flow decreases, pressure ratio increases as stated in one of...

Hi Is someone interested in this topic ? I'd like to share my idea with you, PF people. I also designed a "reverse geometry" to illustrate this paradoxical effect. Thank you for your answer Jean-Marc

Definition/Summary A non-inertial observer measures the same "real" (physical) forces as an inertial observer does, but if he wants to apply the inertial laws of motion, he must add "fictitious" (non-physical) forces. One of these "fictitious" forces is a position-dependent centrifugal...

I was thinking about how a person could create and maintain a vacuum at sea level. I was thinking of any supersonic objects (bullets, etc.), and that a vacuum (or partial) may be directly behind the object as it travels, as the air wouldn't have time to move into replace the void faster than...

Hey all, I recently read a bit about proposals to induce "artificial gravity" on a Mars mission by spinning two sections of a spacecraft on a long cable in order to create a centrifugal force that would simulate gravity by pulling astronauts outward toward the floor of their capsule, or...

Hi all. This is not a homework question, I'm 33 and far away from homework. It is just a personal doubt. I've read a lot about these forces, even some answers from these forums but still can't make something out of them. What I've read: *Centripetal: a force that makes objects attracted to a...

Homework Statement This is not homework. Suppose I am rotating a ball on a string (m=1, r = .2, v = 10 m/s) Homework Equations Fc = (m) v2/r = 500 N*m If I reduce the length of the string to .1, v becomes 20, so Fc = 4000 N*m what is the work I have done, what kind of integration do...

Homework Statement A space station is connected to a box(50kg) with a super strong string(1m) and it is rotating which makes the box rotate at a speed of 10m/s. I am inside the box. Find the force the box exerts on me. Homework Equations ##F=m\frac{v^2}{r}##The Attempt at a Solution I found...

Please refer the drawing and let me know what happens if the pump suction and discharge line bypass together. Thanks.

I'm trying to understand why a superdeformed nucleus may be represented as bulging perpendicular to the axis of rotation, and I'm guessing this is akin to why the Earth does so too. I've gone through secondary school and 3 years of University to have professors/teachers snigger every time they...

Two coins are on a turntable that steadily speeds up, starting from rest, with a ccw rotation. Which coin flies off the turntable first? Coin 2 is further away than coin 1. MY ATTEMPT: I believe centrifugal acceleration is done by friction. So fs=us*m*g. Fc=mv^2/r. Then...

Hi, I have been pondering on this - what is the energy required to move a point mass m0 from a radial position R to the center of a rotating frame, if the linear velocity v of the point mass at position R is relativistic (close to c). For an observer in the rotating frame, it should seem as...

Homework Statement The 9.75 in. impeller option of the Taco Model 4013 F1 series centrifugal pump (pump curve given by Figure P3-2) is used to pump 200 GPM of water at 25 C from an open reservoir whose surface is above the centerline of the pump inlet (Figure P3-1). The piping system from the...

Hi guys. I was reading a paper in which a calculation was done to show that in Schwarzschild space-time, if we consider a time-like circular orbit 4-velocity ##u^{\mu} = \gamma(\xi^{\mu} + \omega \eta^{\mu})## where ##\xi^{\mu}## is the time-like Killing field, ##\eta^{\mu}## is the axial...

Centrifugal Force -- continue spinning indefinately in space? I believe it is correct that if you spin up an object in space, like a space ship, it will continue spinning indefinately unless/until another force is applied to stop it from spinning. Then centrifugal force would push the objects...

We all know that the Centrifugal force is not a real force.However,we can use it mathematically. This Wikipedia Article on Centrifugal force States that: But, According to Newton's first law,objects tend to move in a straight line or stay at rest at a constant velocity unless no external...

Homework Statement There is a fixed coordinate system and a rotating one. the origins don't coincide. The situation is like a stone falling from a tower on earth, where the rotating system has it's origin at the base of the tower. Are the coriolis and centrifugal forces dependent on the...

According to the wikipedia page, when given an angular velocity, centrifugal force increases with radius. I always thought the larger the radius, the smaller the centrifugal force. I think I'm misunderstanding some term here (possibly "angular velocity"). Can someone please explain?

The problem asks me to find the density of gas in a cylinder of radius R and length l rotating about its axis with angular velocity ω, there being a total of N molecules in the cylinder. What I have done is shown as following I choose to look this scenario in a static frame with the cylinder...

Maybe I need to take a little break from my studies but I'm not getting this at all. At the risk of looking really dumb, here's what I need help with; Imagine that you are living in a rotating space habitat. The habitat has a diameter and a rotational speed such that at the outer edge you...

I've got a weekly physics assignment, and I've been racking my brain on it. Any input on the accuracy of my response, what I could do to improve it, and where I may have gone wrong? Homework Statement Some years ago, a newspaper story contained the following statement" "The space shuttle...

Homework Statement 13. Why does the water in a washing machine escape through the little holes during the spin cycle? a The water is flung out of the clothes by the centripetal force. b The water is flung out of the washer by the centrifugal force. c The water is sucked out of the...

Hello! I have some doubts regarding centrifugal force.. Imagine yourself in a car which is taking a sharp turn. You tend to fall to the other side ( if the car door is open you'd fall out of the car) Is this because of inertia which opposes the sudden change in motion or is it because of...