non-inertial frames

A non-inertial frame is a viewpoint or reference point that accelerates or rotates, meaning it's not moving at a constant velocity. Unlike an inertial frame, where objects stay in straight line motion unless acted upon, in a non-inertial frame, apparent forces like "fictitious" or "pseudo" forces seem to appear. For example, inside a car that is turning, you feel pushed to the side; this sensation is due to being in a non-inertial frame. Such frames are useful for describing motion within accelerating systems, but require adjustments to Newton’s laws to account for the additional apparent forces.