A way to investigate motion

Is the bicycle moving with the same speed between the two points or is the speed varying?

If the speed of a moving object does not change with time, we say that the object is in uniform motion.
 

For example, if an ant covers 1 cm distance in one second and continues to cover same 1 cm distance for every second, we can say it is in uniform motion.
 

If the speed of a moving object changes with time, we say that the object is in non-uniform motion.

For example, if another ant covers 1 cm in first second, 2 cm in the next second, 1.5 cm in the third second, we can say it is in non-uniform motion.

Non-uniform motion is quite common. Everyday examples include a bus travelling on the road, birds flying, breeze blowing, water flowing. It is difficult to find examples of uniform motion around us.

In order to be precise, we need to get some data to prove our point in Science. Merely saying something does not work in science.

We shall learn the method that will help us investigate, get data and describe uniform and non-uniform motion in the following sections.