May anyone to me what a fictous force is?

Question

May anyone explain* to me what fictous force is?

fictitious force*

Answer 1

When we are in a frame of reference then then we estimate acceleration on a body by the resultant of all forces on it.
and a force can only be applied only if a body is in direct contact with some other body ( like friction, normal reaction etc ) of if the object comes under the field of force of a body ( lige gravitational force , electric force etc. )

but as U may know that acceleration, distance moved and velocity etc are relative. they are with respect to the observer who is watching them. if I go with 5 m/s and watch a car
going at 3m/s in same directioin then I feel the car moving at 2m/s only.

similarly for acceleration, if I go with acceleration of 5 m/s*2 and watch a car
going at 3m/s*2 in same directioin then I feel the car accelerating at 2m/s*2 only.

but if I accelerate and watch a car at rest then I feel that not me but that car is acccelerating with the same acceleration in backward direction.But I find that there is no agent which is applying force on that particle.
in this case if we apply newtons sec. law on that particle then it will be found that
masss of particle X acceleration of particle = ( 0 force )

SO if we want to satisfy newtons laws in our 'frame of reference' also then we have to 'assume' that a force is acting on that object which is accelerating it.and this force has a magnittude
mass of observed object X acceleration of the observer.

since there is no 'agent' which applies this assumed force so we call this force a 'pseudo force'( pseudo means FALSE)
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but this force depends on the reference frame only.A body cannot feel that it is under the so called real forces or the pseudo force by looking at its acceleration.
This is called the "Principle Of Equivalence"

Answer 2

In the simplest terms, fictitious forces are usually inertia.

Let's put it this way... one of Newton's big revelations was that all reference frames are equally valid from a physics point of view. If you're in space and you see something moving away from you, it's just as valid to say that you're moving and that other thing is stationary. This is a pretty useful idea to physicists.

One reason it's useful is because there is very little that is not moving around. You can put something on the ground in front of you and call it stationary, but the ground is on a rotating planet which is orbiting a sun in a spinning galaxy. And if you want to be really accurate, you need to account for all this motion that is going on in your so-called stationary object. That's where fictitious forces come in.

They're called 'fictitious' forces to distinguish them from real forces that are always present like the electromagnetic force. A fictitious force is only present when you are in a specific frame of reference.

Perhaps the best known one is centrifugal force. If you spin a bucket of water around your head, the water doesn't fall out even when the bucket is upside down. From a certain point of view, there would seem to be something 'holding' the water in the bucket, and that fictional force is the centrifugal force. From another point of view, the water is held in the bucket because of inertia. It wants to keep moving in a straight line, but is constrained by your pulling on the string.

Another good example is coriolis force - what supposedly causes water to swirl in one way down a drain and deflects the paths of hurricanes from straight lines to curved ones. The coriolis force is caused by the rotation of the Earth. If you were in space, you wouldn't observe this force at all... even those hurricanes would seem to move in straight lines. If you're on a specific patch of earth, however, what was a straight line in space LOOKS curved to you.

It's sometimes a difficult idea to wrap your head around. Follow the link... there's a good animated picture there. One of Einstein's revelations is that even gravity is a fictional force because you can choose a reference frame where it disappears. But that's another discussion!

Answer 3

A fictitious force is an apparent force that acts on all masses from an external reference frame.
For example, you are in your car and put the accelerator to the floor.. you feel as if you are being pushed back in your seat. This is a fictitious force. You are not part of the vehicle and you are not moving, therefore you have inertia, what we perceive as the backwards push is the seat cushion reacting to the change in the rate of the car's motion as compared to our motion.

Answer 4

Well, looked around on google... only one answer came up, which is not induce much confidence... but here it is:

It is the "force around a curve"