### inertial reference frame

**(inertial frame of reference, Galilean frame of reference)**
(frame of reference where no force means no acceleration)

An **inertial reference frame**
(or **inertial frame of reference** or **Galilean reference frame**)
is a frame of reference, e.g., set of coordinates,
moving (or not) such that any object with no net
forces on it is not accelerating,
basically a frame of reference moving at constant speed,
i.e., that is not itself accelerating.
An example of a non-inertial reference frame
is one that is rotating, e.g., a reference frame
indicating ones position on Earth, which is rotating,
thus, in which "standing still" actually
includes a slight acceleration
toward the central axis. One can sometimes
work in such a non-inertial reference frame
using the normal principles of dynamics by
assuming forces that would explain the consequences
of the frame's acceleration, examples of such pseudo-forces
being centrifugal force and the Coriolis force.

(*dynamics*)
http://en.wikipedia.org/wiki/Inertial_frame_of_reference

**Referenced by:**

frame of reference

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