0We see many things around as moving. For example a moving bus, a car or dying birds- all are moving. We can see them directly. Apart from this air is also moving but we can not see it moving. But we get to know about it indirectly by seeing the leaves of tree or by flow of wind.
But the motion is actually relative. It depends on the frame of reference we are in. If we are in moving train, our fellow passenger is at rest. But if we see the same passenger from outside the train, we see him moving.
Motion can further be classified into uniform motion and non uniform motion. If an object travels equal distance in equal intervals of time, then it is said to be in uniform motion. In case the distance travelled by the object varies in equal intervals of time, then the object is in non uniform motion. Most of the motions in practical life are non uniform motion.
