Look around you and you find examples of things that are moving. You can probably find countless objects in motion: the hands of the clock, the teacher while he or she is explaining the lesson, birds flying outside the cars or passing by...
We say that an object moves when it changes its position as time passes. An object that moves is described as being MOBILE.
IMAGING YOU ARE TRAVELLING IN A BUS: If you compare yourself to another passenger or the driver, you are at rest. However, if you think about you inside the bus compared to the bus-stop or the buildings, you are in motion.
MOTION is relative, because it depends on the reference point.
Distance and displacement are commonly confused terms in physics that are important to get correct. Distance is a ​scalar quantity​, the total distance traveled by an object (it is measured over the trajectory); displacement is a ​vector quantity​, the shortest path in a straight line between the starting position and final position (it´s independent of the trajectory).
The difference between a vector quantity and a scalar quantity is that vector quantities include information about direction; scalar quantities are simply numbers.
