Inertials
Inertials, in physics, refer to the concept of inertial frames of reference and related notions such as inertia. An inertial frame is a frame of reference in which a body not subjected to external forces moves with constant velocity, and in which Newton's laws hold in their simplest form.
Within inertial frames, the equations of motion are the same as in any other, and the results
Non-inertial frames, by contrast, are accelerating or rotating relative to an inertial frame and exhibit fictitious
Relativity adds nuance: in special relativity, inertial frames move at constant velocity relative to one another
Inertia is the resistance to changes in motion and is quantified by inertial mass, a quantity that
Practically, inertial measurement is implemented with inertial measurement units (IMUs), which combine accelerometers and gyroscopes to