Question

How can we identify that an object is in motion?

Answer 1

Motion is a change in position of an object over time. Motion is described in terms of displacement, distance, velocity, acceleration, time and speed. The motion of a body is observed by attaching a frame of reference to an observer and measuring the change in position of the body relative to that frame.

If the position of a body is not changing with respect to a given frame of reference, the body is said to be at rest, otherwise, it is said to be in motion.