Fictitious Force

A fictitious force, also called a pseudo force, d'Alembert force or inertial force, is an apparent force that acts on all masses in a non-inertial frame of reference, such as 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. As stated by Iro:

Such an additional force due to nonuniform relative motion of two reference frames is called a pseudo-force.

H Iro in A Modern Approach to Classical Mechanics p. 180

According to Newton's second law in the form F = ma, fictitious forces always are proportional to the mass m acted upon.

A fictitious force arises when a frame of reference is accelerating compared to a non-accelerating 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). However, four fictitious forces are defined for frames accelerated in commonly occurring ways: one caused by any relative acceleration of the origin in a straight line (rectilinear acceleration), two caused by any rotation (centrifugal force and Coriolis force) and a fourth, called the Euler force, caused by a variable rate of rotation, should that occur.

Read more about Fictitious Force:  Background, Fictitious Forces On Earth, Detection of Non-inertial Reference Frame, Gravity As A Fictitious Force

Famous quotes containing the words fictitious and/or force:

    It is, indeed, at home that every man must be known by those who would make a just estimate either of his virtue or felicity; for smiles and embroidery are alike occasional, and the mind is often dressed for show in painted honour, and fictitious benevolence.
    Samuel Johnson (1709–1784)

    When we can drain the Ocean into mill-ponds, and bottle up the Force of Gravity, to be sold by retail, in gas jars; then may we hope to comprehend the infinitudes of man’s soul under formulas of Profit and Loss; and rule over this too, as over a patent engine, by checks, and valves, and balances.
    Thomas Carlyle (1795–1881)