Definition:Frame of Reference/Examples

Examples of Frames of Reference

Inertial Frame of Reference

An inertial frame of reference is a frame of reference in which a body moves at constant velocity in the absence of an external force.

That is, it is a frame of reference in which Newton's First Law of Motion holds.

Standard Inertial Frame

A set of coordinate axes fixed in space relative to the position of distant stars is known as a standard inertial frame.

Non-Inertial Frame of Reference

Let $P$ a particle be stationary in a given frame of reference $F_1$.

However, let $P$ also be accelerating in an inertial frame of reference $F_2$.

Then $F_1$ is known as a non-inertial frame of reference.