GENERAL KNOWLEDGE

Detailed explanation-1: -All motions are relative to some frame of reference. Saying that a body is at rest, which means that it is not in motion, merely means that it is being described with respect to a frame of reference that is moving together with the body.

Detailed explanation-2: -Relative motion is the calculation of the motion of an object with regard to some other moving or stationary object. Thus, the motion is not calculated with reference to the earth, but is the velocity of the object in reference to the other moving object as if it were in a static state.

Detailed explanation-3: -Rest and motion are always relative. A body cannot exist at a state of absolute rest or absolute motion. For example, two persons sitting in a moving bus are at rest w.r.t each other but are in motion w.r.t. a person standing on the roadside.