# inertial reference frame

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## inertial reference frame

[i′nər·shəl ′ref·rəns ‚frām]
(mechanics)
A coordinate system in which a body moves with constant velocity as long as no force is acting on it. Also known as inertial coordinate system.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Tangherlini's formula (2) gives an explanation to the results obtained in the Michelson-Morley experiment [9] and also in the Kennedy-Thorndike experiment [10], because, according to Tangherlini's formula, the common time of the travel of a light beam toward and backward doesn't depend on the velocity v the inertial reference frame K' moves with respect to the "preferred" inertial reference frame K.
However just the anisotropy of the cosmic microwave background was found in 1977, the scientists have understood that fact that our inertial reference frame, connected to the Earth, moves with a velocity of about 360 km/sec with respect to a "preferred" inertial reference frame, where the microwave background radiation is mostly isotropic so that the common momentum of all space masses of our Universe is zero.
The generalized photon moves with velocity v of magnitude [parallel]v[parallel] = c in any inertial reference frame. This has as a conse-[parallel]u[parallel] = c in any inertial reference frame.
Furthermore, in the inertial reference frame S' it is [theta]' = [delta]', as can be seen from figure 7.
Substitution of (5), (6), and (7) into (4) yields the following scalar equation for the rate of change of moment of momentum [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] for the system "crane boom B[O.sub.2]-load M" with respect to point [O.sub.2] in the inertial reference frame [x.sub.2][y.sub.2][z.sub.2]:
The vector equation (I.8) determines the initial relative velocity [V.sub.M/B] (0) of the load M in the inertial reference frame E as
The direction of the vector for the initial relative velocity [V.sub.M/B](0) is directed opposite to the unit vector [[??].sub.2] in the inertial reference frame E; that is, [V.sub.M/B](0) [up arrow][down arrow] [[??].sub.2].
Caption: Figure 10: Positional curves of the end-effector in inertial reference frame.
(5) [[summation].sub.i] and [[summation].sub.I] are, respectively, the body- fixed reference frame and the inertial reference frame. In general, the origin of the inertial reference frame and the center of mass of the SBMS overlap to some extent in the initial state, and the direction of [[summation].sub.O] coincides with that of [[summation].sub.I].
To define the two instantaneous inertial reference frames to accomplish, simply, the effect of the Earth rotation, we, firstly, write down the rotation velocities of the points [??] and [??] about Earth's rotation axis, i.e., we write down the rotation velocities of (CERN) and (Gran Sasso) about Earth's axis.
In the general case the hypothesis of existence of material objects and inertial reference frames, moving with the velocity, greater than the velocity of light, does not lead to temporal paradoxes, connected with existence of formal possibility of returning to the own past.

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