Definitions for

**"Inertial frame"**a set of coordinates that is not accelerating.

A frame of reference that is not accelerating, one in which Newton's first law is true.

a coordinate system in which Newton's first law of motion is valid

Definitions for **"Inertial frame"**

a set of coordinates that is not accelerating.

A frame of reference that is not accelerating, one in which Newton's first law is true.

a coordinate system in which Newton's first law of motion is valid