Question

what do you mean by frame of reference ? and what do you mean by motion​

Answer 1

Answer:

An observational frame of reference, often referred to as a physical frame of reference, a frame of reference, or simply a frame, is a physical concept related to an observer and the observer's state of motion. ... An inertial frame of reference is defined as one in which all laws of physics take on their simplest form.

Motion, in physics, change with time of the position or orientation of a body. ... Motion that changes the orientation of a body is called rotation. In both cases all points in the body have the same velocity (directed speed) and the same acceleration (time rate of change of velocity).

Answer 2

Explanation:

An observational frame of reference, often referred to as a physical frame of reference, a frame of reference, or simply a frame, is a physical concept related to an observer and the observer's state of motion. ... An inertial frame of reference is defined as one in which all laws of physics take on their simplest form.