Inertial
/ɪˈnɜː.ʃəl/
"Inertial" in a Sentence (2 examples)
When viewed in an inertial reference frame, an object either remains at rest or continues to move at a constant velocity, unless acted upon by a net force.
The inertial measurement unit contains accelerometers, which—just like the accelerometers within the inclinometer—can be used to estimate the initial attitude.