Centrifugal Definition and 344 Threads

How can we predict the actual test performance of pump from CFD. I need some formulation/calculation method to predict closure.

hello guys here's another question my pump not pumping liquied althoug the pump is under the tank why ?

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...

1. Do centripetal and centrifugal act on same body or on different bodies?? I am told that if a stone tied to one end of the string is revolved around its another end(fixed), centripetal force acts on stone and centrifugal force acts on the fixed end of the string. The Attempt at a Solution I...

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...

Homework Statement An object sliding along a smooth horizontal ruler that I am holding will fly off as a result of the centrifugal force if I am rotating. Write down Newton's 2nd law for the sliding object as viewed by me in the rotating frame whilst moving with angular velocity w, and verify...

If I have a mass of 80 kg, what would the difference in my weight be at either the North or South Pole and at the equator? It would seem to me that the spin of the Earth would induce a centrifugal effect that would counter somewhat Earth's gravitational pull at the equator, but not do so at...

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...

in the centrifugal compressor the function of the volute or the diffuser to convert kinetic energy into pressure energy my question is isn't it bernouuli equation??and we can apply bernouuli equation to incompressible fluid?? also wouldn't that cause an exapnsion to fluid which causes reduction...

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

I read that the centrifugal force acts radially outwards on a stone being revolved by a person with a string. But I have just fallen into the confusion as what keeps the stone at a constant height when one is revolving it above one's head. Surely there must be a vertical force too, equal to the...

Just want to make sure my concepts about this fictitious force is correct... " Assuming Joe is spinning around on a stationary point, while holding a string tightened onto stone. Therefore, he is providing a centripetal force to the stone through the string, so that it rotates around him...

I had a test the other day and it doesn't sound like it will be graded for quite some time (our TA seems to be over his head in classwork). I wanted to see if anyone here could tell me if my answer to one of the questions is correct and justified. Prethanks. Homework Statement "A bucket...

Hello, When I thought about centrifugal force, gravity came into my mind... When we tie a rope around a ball and rotate it in the air, rope gets some tension ( small displacement between atoms of rope ) and we feel this as centrifugal force. This force occurs because we apply an...

i'm looking for some kind of formula for how much centrifugal force an object in motion has. for example i have a metal ring spinning x fast how much force is there. it a brake was applied to it so to speak how much force would be exerted on the break. i have a idea that is going to...

http://users.on.net/~rohanlal/cent.jpg my attempt: The car becomes lighter as it passes over the arc therefore its going to exert a force on the road that is less than its normal force. f=mv^2/r f=1710(16.6)^2/38.5 = 12239.15844 9.8 x 1710 = 16758 16758-12239.15844 this is incorrect...

centrifugal or what?? Hello all! i have been reading different books thoughout the years and some people talk generally about centrifugal force being not a real force. Know would someone please explain if why this is the case. Also how do you find the force on a wall of a spinning...

I know it's relatively easy to show that the only possible orbits given an inverse square centripetal force relation are conic sections, of which the only stable orbits are ellipses. However, I was wondering what the situation would be given a centrifugal force (really a misnomer, since it...

Homework Statement A race-car driver is driving her car at a record-breaking speed of 225kh/h. The first turn on the course is banked at 15 degrees, and the car's mass is 1450kg. a) Calculate the radius of the curvature for this turn b) Calculate the centripetal acceleration of the car...

Homework Statement A puck of mass m = 1.10 kg slides in a circle of radius r = 18.0 cm on a frictionless table while attached to a hanging cylinder of mass M = 3.00 kg by a cord through a hole in the table. What speed (in m/s) keeps the cylinder at rest? Homework Equations F = maThe Attempt at...

If i could get some help on this that would be great. so.. A space station has an outer wall which acts as a floor at a radius of 180 meters. At what tangible speed must the space station rotate to simulate Earth's gravity. hint: assume a centrifugal force of 49 Newtons is required on a...

Homework Statement I'm working on a problem in which I have to calculate the centrifugal force. I know the equation and everything, I'm just stuck on what units my angular velocity should have. Homework Equations \vec{F_{cen}}=-m\omega\times(\omega \times r') The Attempt at a...

Homework Statement we have a spaceship with a spinning wheel artificial gravity thingy on-board with radius 25m, period ~ 12s, a=6.87 it is spinning anticlockwise if we take a perspective looking down on it (in the bottomleft is point A,bottom right point B,and at the top point C) an...

Hello, layman question here. Suppose a spaceship approaches a highly massive body, at great speed; it violently swings around the body and comes back in less than a minute. All in a free trajectory, with thrusters never applied. The question is: would the occupants of the ship be crushed...

Hello all. From Laurent – Introduction to Spacetime. Referring to the Hafele and Keating experiment. ---Let us neglect gravitation and picture the Earth as a merry-go-round all alone in empty space. The rim of the merry-go-round corresponds to the equator. Let us further assume that two...

Hi everyone, I've got a set of airfoil blades here which are homogenious and have a constant profile (x-section). Each blade is of equal length (as should be). What would the best way be to calculate the centrifugal force on the blade root as a result of constant angular speed? say o -...

Homework Statement Hi guys, I've been working on some problems at uni to try and get to know this subject better and i have been unable to answer a question. the impellar of a centrifugel pump has the following configaration, diameter 254 (hence r2=127) blade exit angle (Beta) 32degrees...

Can anyone comment on the reaction force to the centrifugal force?

Hi everyone, Today in a question I saw an equality like this but I couldn't figure out how they are equal? Can anyonu help me please? mv^2/ r = | dV/dr |

I was thinking about the Space Elevator idea, and I think most of us can agree that as one goes higher up the the tower, the pull of gravity gets weaker and "centrifugal force" gets stronger (compared to one another), until the altitude of geosynchronous orbit, where the two become equal. So...

Horizontal Waterwheel (from: "centrifugal force" thread) This is all over my head, but I'm in the water and I want to learn,:eek: Maybe you guys need a mechanical challenge to apply your classical physics to:rolleyes:. I know very little of what has been said, or how to make calculations...

Ok, I have a general question about centrifugal force. Lets say I have an object who moves in a circular path, we know the object is accelerating because the velocity is constantly changing direction, the acceleration is towards the center. Now, where does the centrifugal force comes to...

Sometime in the mid-nineteenth century centrifugal force fell from grace with modern physics. Physics texts from the 1920’s define it, even apply it, yet modern texts ignore or deny it. Newton, Mach, Berkeley and Einstein all used centrifugal force to describe a force that seeks to “flee...

I am reposting this post because i forgot I had already posted a topic with the same subject, I study physics at uni, but spend my weekends down the casino on the roulette table. I tried to explain to my friend that the reason roulette works is that the centrepetal force of the ball is great...

Hello everyone, It's been a long time since I've taken a physics course, but recently I've become interested again and am studying some classical mechanics in my spare time. I was thinking the other night about that computer generated Ford commercial where the truck is spun on a rotating arm...

I attached a string to the center point of one end of a 2 foot length of steel pipe, and then while holding the loose end of the string overhead I swung the pipe in a circle. When I released the string the pipe flew off in a straight line as I expected, but what I didn't expect was, the pipe...

I've heard recently that centrifugal "force" doesn't exist. If this is true what is the actual force that creates the centrifugal effect? Also, do centrifugal and centripetal effects/forces exist in outer space, i.e. on space shuttle. Thanks

Hi, i need to know how to calculate the moment of inertia of a centrifugal fan. I searched the forum but didint find any formula... So please people help me

What is a centrifugal force? Is it a pseudo force? Does it really exist?.. Maybe i am not getting the idea of what a pseudo force is...

Homework Statement From Taylor's "Classical Mechanics", problem 9.15: On a certain planet, which is perfectly spherically symmetric, the free-fall acceleration has magnitude g = g_0 at the North Pole and g = \lambda g_0 at the equator (with 0 \leq \lambda \leq 1). Find g(\theta), the...

Good Evening to all, I have been working on the following problem for the past several days and have finally come to the end of my rope. I hate to admit defeat but I do need some help. I'm almost certain I'm simply missing something that's embarassingly simple... This is the problem...

so here is my questions since the Earth is spinning, wouldn't centrifugal force make us lighter? if we were not spinning would we be heaver? how come i do not have gravity? what is gravity

Anyone familiar with "centrifugal potential" and "brachistochrone" in polar coords? Hi there, The issue appears within this problem: a bead is sliding without friction on a straight wire; the wire rotates in a plane: \omega= const No external fields, no gravity...

I have been having trouble with three problems from various homeworks. 1. A 500 g ball swings in a vertical circle at the end of a 1.5-m-long string. When the ball is at the bottom of the circle, the tension in the string is 15 N. What is the speed of the ball at that point? 2.It is...

Homework Statement A bug crawls outward from the center of a CD spinning at 200 revolutions per min. The static friction coefficient is 1.2 between the bug and cd. How far does the bug get from the center before slipping? https://www.physicsforums.com/Nexus/editor/menupop.gif...

hey guys, i was wondering if any of you know the general values for the friction coefficient as well as the mass of the brake shoes and the spring constant for the centrifugal brakes (i know there are probably all sort of values, but please just give me a general rough estimate)? The brake is...

Homework Statement A sample of blood is placed in a centrifuge of radius 15.7 cm. The mass of a red corpuscle is 3.09×10-16 kg, and the magnitude of the force required to make it settle out of the plasma is 4.01×10-11 N. At how many revolutions per second should the centrifuge be operated...

hay everyone i have a research on centrifugal pump and specifically on the pump volute. this research is for fundamentals of manufacturing course, i need some help with finding the appropriate sources of information. so does anyone know a good book or a website that is not in...