## What is meaning by pseudo force?

[ sōō′dō ] A physically apparent but nonexistent force felt by an observer in a noninertial frame (that is, a frame undergoing acceleration). Newton’s laws of motion hold true within such a reference frame only if the existence of such a force is presumed. The centrifugal force is an example of a pseudo force.

## Is centrifugal force is a fictitious force?

centrifugal force, a fictitious force, peculiar to a particle moving on a circular path, that has the same magnitude and dimensions as the force that keeps the particle on its circular path (the centripetal force) but points in the opposite direction.

**Which force is called a fictitious force?**

A fictitious force (also called a pseudo force, d’Alembert force, or inertial force) is a force that appears to act on a mass whose motion is described using a non-inertial frame of reference, such as an accelerating or rotating reference frame.

**Which is called fictitious force?**

centrifugal force is called fictitious force.

### Why centrifugal force is a fictitious force?

When an object undergoes rotation, from the object’s reference frame, which is a non-inertial reference frame, the object feels there is a radially outward force, a centrifugal force, acting on it. However, from an inertial reference frame, this force doesn’t exist at all. That’s why it is called a fictitious force.

### Why is the centripetal force fictitious?

We say fictitious because the actual source of the centrifugal acceleration is somewhat indirect and the experience one has results from the unbalanced forces acting on the reference frame, not a force. Note, it is an acceleration not a force. For instance, imagine yourself on a swing.

**Where does the fictitious force in physics come from?**

Fictitious force. The fictitious force thus does not arise from any physical interaction between two objects (that is, it is not a “contact force”), but rather from the acceleration a of the non-inertial reference frame itself, which from the viewpoint of the frame now appears to be an acceleration of the object instead,…

**Can a fictitious force be as arbitrary as a frame?**

As a frame can accelerate in any arbitrary way, so can fictitious forces be as arbitrary (but only in direct response to the acceleration of the frame).

## Why are fictitious forces not necessary in general relativity?

Inertial frames are privileged over non-inertial frames because they do not have physics whose causes are outside of the system, while non-inertial frames do. Fictitious forces, or physics whose cause is outside of the system, are no longer necessary in general relativity, since these physics are explained with the geodesics of spacetime.

## Are there any fictitious forces in the accelerating frame?

Therefore, the inertial frame has a simpler physical explanation (not necessarily a simpler mathematical formulation), indicating the accelerating frame is a non-inertial frame of reference. In other words, in the inertial frame, fictitious forces are zero.