In Newtonian mechanics, the centrifugal force is an inertial force (also called a "fictitious" or "pseudo" force) that appears to act on all objects when viewed in a rotating frame of reference. It is directed away from an axis which is parallel to the axis of rotation and passing through the coordinate system's origin. If the axis of rotation passes through the coordinate system's origin, the centrifugal force is directed radially outwards from that axis. The magnitude of centrifugal force F on an object of mass m at the distance r from the origin of a frame of reference rotating with angular velocity ω is:
The concept of centrifugal force can be applied in rotating devices, such as centrifuges, centrifugal pumps, centrifugal governors, and centrifugal clutches, and in centrifugal railways, planetary orbits and banked curves, when they are analyzed in a rotating coordinate system.
Confusingly, the term has sometimes also been used for the reactive centrifugal force, a real inertial-frame-independent Newtonian force that exists as a reaction to a centripetal force.
My current spaceship design with several ring habitats (6 in my case) works well for worldbuilding purposes, in the sense that the reader should easily be able to tell what types of facilities can be found where on the ship. That’s because the rings distinguish themselves from each other by...
Hi Folks!I have limited understanding of physics. I am trying to put into words the working principles of a mixer grinder, specifically for making a mango milkshake. So far, these are the steps I have come up with:
Where am I wrong? What things have I gotten right?
Thanks!
Picture a flat disk of radius r with a radial vane. The disk is rotating at angular velocity w. Assume the vane is straight, starts at the center and ends at the perimeter of the disk.
A very small round mass ( of m grams) is dropped onto the disk very near the center. The vane contacts it and...
As I understand it, when a body undergoes uniform circular motion its velocity does not change in magnitude but instead direction. This change in velocity, or acceleration, is directed inward towards the center of the circle. If a body was not experiencing a net centripetal acceleration, then...
A demonstration of the direction water swirls in two hemispheres Sync the videos yourself: http://toiletswirl.com For the record Destin and I repeat... 2 different Videos synced. The explanation of why water swirls in a specific direction is at about 4 minutes into the video.
Matt and Hugh play with a tennis ball and a brick. Then they do some working out to derive the formula for the centripetal force (a = v^2/r) by differentiati...
Homework Statement
Hello, so I currently designing a centrifugal brake, I know how much torque it needs to stop etc just unsure of a few things.
How would I calculate frictional torque? I understand that I can use the net torque to determine what torque is needed for equilibrium etc however I...
Hello all,
I understand there are four d'Alembert (fictitious) (non-inertial) forces:
1. Coriolis
2. Centrifugal
3. Linear
4. Angular acceleration.
But then I think about the Gyroscopic Effect (I understand how it arises, so that is not the issue).
I am wondering if one can "classify" these...
I do not understand why the tan component for a gravity affected by the centrifugal force:
g = Ω^2 * R * sinθ * cosθ
So I tried to draw this: using a "big" X-shaped axis where the / component goes along the main gravity direction while \ points normal to / this direction. Then the centrifugal...
Hi
I am spending time on youtube looking at videos that come up when I search "Centrifugal propulsion"
(No need for me to pick a few, you can do a search and see lots.)
Most of the videos look poorly made. All show some sort of "vehicle." But the "vehicle" jitters back and forth.
I am...
Hi!
I am currently working on a project that includes rotating a water-filled container. The container is NOT spinning about its vertical axis, but about the vertical axis of the rotating disc.
I am aware that the surface shape of water in a rotating bucket takes the shape of a parabola when it...
Hello,
An object moves outward in shaft radially due to centrifugal force.
lest say it weights 1kg . in a timestep=0.0001 it travels 0.0017 meters
this is actually the difference of two radius,
let say first radius r1 = 0.25 meters
second r2 = 0.25 + 0.0017 meters
rpm of the rotating system...
Hello everyone!
I have seen several DIY projects which successfully gathered heavy water
from normal water. For example Cody from codys lab used electrolysis
to "enrich" the water. This however is a messy process.
So i became curious, if this can be done easier by centrifugation.
Based on...
Hey, I'm having some difficulty in understanding circular motion and it's forces. Here is the situation I'm on:
Imagine you are on a smooth turn-table with smooth shoes and the table starts spinning. Because of inertia, and because the frictional force is not nearly enough to keep you going in a...
I'm studying effective potential in Newtonian gravitation. The mechanical energy of a body can be written
$$E=\frac{1}{2}\mu {\dot{r}}^2+\frac{L^2}{2\mu r^2}-\gamma \frac{m M}{r^2} \tag{1}$$
Where \mu is the reduced mass of the system planet-star.
Consider now the term...
I used to think I understood this - big mistake!
I've just watched a great classic Feynman lecture posted by another PF user (a superb way to spend 50 mins of you can spare the time)
https://www.physicsforums.com/threads/i-found-the-best-teacher-of-physics.855335/
In that lecture, Feynman...
Hi - Can anyone help me out with a question. The answer seems obvious, but maybe so obvious that I'm jumping to wrong conclusions!
Just been reading Guy Martin's book "When your dead, your dead" (good read by the way) and one of his stories is about breaking the world speed record for a wall of...
Homework Statement
You are standing 2.7 m from the centre of a spinning merry-go-round holding one end of a string tied to a 120g mass. The merry-go-round has a period of 3.9 s.
Draw a system diagram of the situation.
Draw an FBD of the mass in Earth's frame of reference.
Draw an FBD of the...
I need to deliver air up to 5 meters high. I am thinking of using pump since I can find easily (no buying anything). Is it possible to deliver air using hydraulic centrifugal pump ?
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...
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...
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...