fictitious force is.......?

Answer 1

dear, note carefully , fictitious force is actually a force which acts when body and observer both are in non inertial frame. generally,force = mass of the body x acceleration of body.
fictitious force = mass of the body x acc.of frame. this is the reason for calling fictitious force.
thanks.

Answer 2

A fictitious force, also called a pseudo force[1], is an apparent force that acts on all masses in a non-inertial frame of reference, e.g., a rotating reference frame. The force F does not arise from any physical interaction, but rather from the acceleration a of the non-inertial reference frame itself. Due to Newton's second law F = ma, fictitious forces are always proportional to the mass m being acted upon. [Wikipedia]

Centrifugal force is a prime example of a fictitious force F = mv^2/R; where a = v^2/R the fictitious acceleration outward from the center of curvature having radius R. The real force, as opposed to this fictitious one, is the force that makes the mass m curve in its travels at velocity v.

The real force causing the curved path is called centripetal force. As there is an equal, but opposite force whenever a system has a net force of zero acting on it, centrifugal force is that equal, but opposite force to the centripetal force. In real physical systems, centripetal force can be the tug of gravity (like on an orbiting satellite) or the tug of a string (like when spinning a tennis ball on a string around your head).

Good question.

Answer 3

...........that which arises without any apparent source. There are four known forces in nature - gravitational, electromagnectic, strong and weak forces arising from what we call mass, charge
and its motion and nuclear particles respectively.
Besides these, an apparent force comes into play when a frame of reference has an accelerated motion. For example, when brakes are applied a car has a decelerated motion and the passengers inside feel as if they are subjected to a force which is hurtling them forward. The pasengers have an accelerated motion with respect to the car and it would appear to them as if some force has come into play . This is what is called a pseudo force.
There is no source as such but the phenomenon can be explained by assuming that the passengers are subjected to a force of a magnitude given by the mass of the body (passengers) multiplied by the aceleration of the frame of reference (car).

Answer 4

centrifugal force is an example of a fictitious, or fake, force. Its a way of explaining why when you turn left really fast in a car, youre thrown against the window. It says theres a force outward, opposing the real, centripetal force, directed towards the center of rotating object. ITS NOT REAL THOUGH. the reason you are thrown against the window when you turn is because you have INERTIA, you want to stay where you were, maintain your straight line motion. centrifugal force is just a way of explaining that.

Answer 5

In inertial frames of referece, all the forces are due to interaction between objects. Since the frames are moving rectilinearly there are no forces from outside.

Newton's third law is valid only in inertial frames of reference.

Bodies in circlar motion ( for example) will always have centripetal force.

If we switch over to a frame like the one above, which is in curvilinear motion, this frame is non inertial frame of reference and other than the interaction forces there is outside force and the force will not obey newton's third law for objects within this reference frame.

Now to describe the motion of the bodies as per newton's law we have to apply a force opposite to these inertial force ( acceleration) so as to make our frame inertial.

The force is not actually present and we apply it to make the frame as inertial. So it is called fictious force.

When we are in a bus our reference frame is the bus.

The bus is in curcular motion. It is a non inertial frame of reference. The bus is in circular motion because of centripetal force which acts toward the center.

But to describe the motion of objects inside the bus we apply a centrifugal force on each and every object inside the bus and describe their motion.

This force is a fictitious one and do not have existence.

Answer 6

The direction of magnetic field is the direction of an isolated hypothetical magnetic pole and is not the direction of electrically charged particle. Or simply the direction of magnetic force at that point and is not the Lorenz force. Lorenz force is the force perpendicular to the velocity of moving charged particle and not on a magnetic pole.

Answer 7

fictitious force or pseudo force is .........an effect that a body feels wen it is moved against the gravity.............wen u move upward in a fast moving elevator.......u experiances a gain in ur weight......that is pseudo force......its opposite to direction of motion.....and magnitude is equal to .....m x a........where 'm' is mass of ur body and 'a' aceleration of elevator

Answer 8

it is like adownward force that you feel when in an elevator which starts moving up with an acceleration.you cannot tell the source of the force, gravity, electromagnetic etc.

Answer 9

there are two types of forces.one which are real,i.e, they really exist.and other fictitious which are not real.