Inertial space | Wikipedia audio article
Channel: wikipedia tts
Date: 04/05/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Inertial_frame_of_reference


00:02:43 1 Introduction
00:14:51 2 Background
00:15:01 2.1 A set of frames where the laws of physics are simple
00:18:02 2.2 Absolute space
00:20:50 3 Newton's inertial frame of reference
00:25:47 4 Separating non-inertial from inertial reference frames
00:26:00 4.1 Theory
00:32:07 4.2 Applications
00:34:21 5 Newtonian mechanics
00:36:42 6 Special relativity
00:37:52 7 General relativity



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SUMMARY
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An inertial frame of reference in classical physics and special relativity is a frame of reference in which a body with zero net force acting upon it is not accelerating; that is, such a body is at rest or it is moving at a constant speed in a straight line. In analytical terms, it is a frame of reference that describes time and space homogeneously, isotropically, and in a time-independent manner. Conceptually, the physics of a system in an inertial frame have no causes external to the system. An inertial frame of reference may also be called an inertial reference frame, inertial frame, Galilean reference frame, or inertial space.All inertial frames are in a state of constant, rectilinear motion with respect to one another; an accelerometer moving with any of them would detect zero acceleration. Measurements in one inertial frame can be converted to measurements in another by a simple transformation (the Galilean transformation in Newtonian physics and the Lorentz transformation in special relativity). In general relativity, in any region small enough for the curvature of spacetime and tidal forces to be negligible, one can find a set of inertial frames that approximately describe that region.In a non-inertial reference frame in classical physics and special relativity, the physics of a system vary depending on the acceleration of that frame with respect to an inertial frame, and the usual physical forces must be supplemented by fictitious forces. In contrast, systems in general relativity don't have external causes, because of the principle of geodesic motion. In classical physics, for example, a ball dropped towards the ground does not go exactly straight down because the Earth is rotating, which means the frame of reference of an observer on Earth is not inertial. The physics must account for the Coriolis effect—in this case thought of as a force—to predict the horizontal motion. Another example of such a fictitious force associated with rotating reference frames is the centrifugal effect, or centrifugal force.