inertial system

noun Physics.
a frame of reference in which a body remains at rest or moves with constant linear velocity unless acted upon by forces: any frame of reference that moves with constant velocity relative to an inertial system is itself an inertial system.
Also called inertial reference frame.
Compare law of motion.


Origin:
1950–55

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World English Dictionary
inertial system
 
n
Also called: inertial reference frame a frame of reference within which bodies are not accelerated unless acted upon by external forces

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
In other words, all the physical laws must have the same form in every inertial system.
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