Question

Can someone please explain what is a non inertial frame of reference? Simply and in detail(examples too)

Answer 1

I know that any frame of reference which is accelerating with respect to another frame of reference is non inertial frame of reference,correct me if im wrong

Answer 2

I was typing out a longer answer and decided that I think your description is pretty decent.

I found this which explains it pretty good in my mind:
"A non-inertial reference frame is a frame of reference that is undergoing acceleration with respect to an inertial frame."

A person watching a moving train while standing still or at a constant velocity would be in an inertial frame of reference. Conversely, another person on the train (which is accelerating with respect to the guy standing still) would be in a non-inertial frame of reference.

Answer 3

From that definition I would conclude that determine which object is in an inertial reference frame and which is in a non-inertial reference frame is strictly based upon which object you determine is doing the accelerating.

Answer 4

Just to add my two cents, a nice definition of an inertial reference frame is one in which the newton's 1st law holds in the absence of applied forces. I.e. an inertial frame is one in which an object at rest stays at rest and an object moving at constant velocity continues moving at constant velocity unless an external force is applied to it.