Centrifugal force Definition and 203 Threads

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...

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 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...

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 -...

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

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

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...

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...

A train is running smoothly along a curved track at the rate of 50 m/s. A passenger standing on a set of scales observes that his weight is 10% greater than when the train is at rest. The track is banked so that the force acting on the passenger is normal to the floor of the train. What is the...

What I want to do is maintain a gas at very high pressure and temperature for propulsion purposes. The problem is containing a gas at high pressure requires a thick walled tank, and the resulting mass would obviate the advantage of having the gas at high pressure. So what I'm considering is...

Hello, this is my first post here :) The question I'm having problem with follows: how long would one day have to be so that there would be weightlessness on the equator? (the teacher said that the correct anwser would be roughly 5 minutes) Solving this by myself I couldn't reach any other...

hi, what is difference between Centripedal & Centrifugal ? One is in inertial frames and the other in rotating frames? one is 'true' force and the other is fictitious force? thanks

Can someone enlighten me why it is mentioned in the thread https://www.physicsforums.com/showthread.php?p=769852" that when the water is viewed from a rotating frame of reference it experiences an outward centrifugal force. This does not make sense to me.

"Centrifugal" Force Say you have a cylinder of radius r with πr2h liters of water in it. If you put it on some sort of turntable and spin it with an angular velocity ω, is there a way to tell what the shape of the water will be? I mean, if you look at the cross section will you be able to...

Hi, I'm attempting to workout what is the G-force applied to an object that is traveling at 1 m/s/s in a perfect circle with a radius of 5m. The circle is verticle not horizontal. The total weight being propelled is 300KG and is running on the inside of a track. There is no air resistance or...

I am having problems explaining the a certain group of inanic acquaintences that just can't understand that centrifugal force, is a fallacy. I have explained centripetal force and Newtons first law, but they still don't get it. could any of you help me here?

My aerospace application requires a very lightweight vacuum chamber. Could you rotate a cylindrical chamber about its vertical axis to provide outward pressure to support the pressure of the air? How fast would it have to rotate to provide an outward pressure of 15 lbs./sq. in.? The initial...

Centrifugal force? Hi people, Can someone explain to me what is centrifugal force? Please tell me the equations related to it. I have tried by best to calculate it, but I have drawn a blank.

Hi Peoples, Newbie here who would really appreciate some advice! I'm developing a machine to emulate G-Force but within a defined area therefore i need to now what forces are at play and what is required to sustain for example 1G or 2G upto a 5G range. If this was a confusing question...

Ok so I'm reading up on some physical (no that's probably not the right word, enlighten me!) phenomenas in this case the tides. So as far as I've understood the water on the surface towards the moon is affected both by Earth's gravity (which is bigger) and the moon's, and therefore positions...

I got this from Wikipedia (under the definition of centrifugal force): I need some clarification here. I had understood that the "ficticious forces" of centrifugal and coriolis were "inertial effects," and that with GR the gravitational force was also an inertial effect. The Wikipedia...

An enclosed cylindrical* (disc) vessel one inch thick and five inches in radius holding two pounds of fluid at ambient atmospheric pressure (14psi?)and being spun at 30,000 rpm's. Assume the centrifugal force acting on the fluid creates a pressure of 1,000 psi. The question is ... "If the...

I have a tool that is used in CNC metal cutting machines. This tool rotates and we have a machine that calculates the amount of immbalance. The known values are, rpm, amount of imbalance (gmm), diameter. I'm trying to find a formula that calculates the centrifugal force that is generated...

Here is another problem I'm having trouble understanding: A narrow but solid spool of thread has radius R and mass M. If you pull up on the thread so that the center of mass of the spool remains suspended in the air at the same place, (a) what force must you exert on the thread? (b) How much...

I have a simple math problem. I know the basic formula, but am too far removed from math lessons(50 years of age) to figure it out. I know you require like units to derive an answer. A 200 gram object is rotated around a 4' radius at 100 mph. What is the centrifugal force? I know(at least...

Hello guys! Back in my first physics class in college, a few years ago, my prof said that centrifugal force does not exist, and something about there is something called the centrifugal force effect that we seem to think we feel, but it really is centripetal force. I took this as physics...

Hello guys! Back in my first physics class in college, a few years ago, my prof said that centrifugal force does not exist, and something about there is something called the centrifugal force effect that we seem to think we feel, but it really is centripetal force. I took this as physics...

http://www.appeal-democrat.com/articles/2004/01/19/news/local_news/news2.prt

Is the "centrifugal force" fictitious or just incidental? Is the "centrifugal force" fictitious or just incidental?

Imagine a universe with nothing in it exept for the earth. Now if you were to put a satalite up in space with a geosyncronized orbit, the gravity of Earth would not pull the object down. but how can that happen if the Earth is not spinning? At least not spinning relative to anything(because...