Question

what is the inertial and non inertial frame

Answer 1

Likewise, an inertial frame of reference is a reference frame in which an object stays either at rest or at a constant velocity unless another force acts upon it. When a body does not seem to be acting in accordance with inertia, it is in a non-inertial frame of reference or accelerating.

Answer 2

The frame of reference in which Newton's first law holds.. Is called as inertial frame of reference. Means it is at rest or in uniform velocity.

The frame of reference in which Newton's first law does not holds.. Is called as non inertial frame of reference. Means it is accelerated.

The frame of reference is position in which anybody do observations to find different physical quantities like speed, momentum etc.

Hope it's helpful to u.