what is uniform motion and non-uniform motion??????????

Uniform motion :----

As shown by Einstein's Principle of Relativity, motion is a necessarily relative concept: what appears to be moving from one frame of reference may not appear to be moving, or moving in the same way, from another frame of reference. From a physical point of view, all frames of reference are given equal validation. So uniform motion itself will also be a relative concept. If an object A is in uniform motion relative to another object B, then from B's view there appear to be no force applied to A; i.e. it appears to be neither accelerating nor decelerating, nor changing directions or moving in a curve. The same should apply vice versa...!!@@!!

&.....

Non-uniform motion :---

When the direction and speed of an object in motion changes then it is called non-uniform motion...!!@@!!

first perfectly say if it is straight line or circular  -   if it is  straight line then particle moving with constant velocity is uniform  and non_ uniform is the particle moving with varying speed OR direction ..OR if it is circular then particle moving with constant speed on the circular path with varying velocity that means varying only direction this is just uniform circular motion . and the another one is non-uniform circular motion with varying velocity....   

Hi

 Uniform motion., .When an object covers equal distances in equal intervals of time however small or big the time interval may be, the object is said to have uniform motion.

The simplest of all motions is uniform motion that we come across in our day-to-day life, although most of the motions are not uniform^ Let us consider an example. A car, starts from O and after 15 seconds it reaches A covering a distance of 20 metres from the origin (Fig. 1.10). In next 15 seconds it reaches B covering a distance of 40 metres from origin and in next 15 seconds it reaches C covering a distance of 60 metres from origin.

In this case the car covers a distance of 20 metres in each 15 second interval. It means that the distance covered by the car is directly proportional to the time. If we-plot a

graph between distance and time for this motion it comes but to be a straight line (we will be discussing more about it later in this chapter) and is known as uniform motion graph (Fig. 1.11

graph between distance and time for this motion it comes but to be a straight line (we will be discussing more about it later in this chapter) and is known as uniform motion graph (Fig. 1.11).

Non-uniform motion. When an object covers unequal distances in equal intervals of time, however small or big the time interval may be, the object is said to have non-uniform motion. Most of the motions which we come across in our daily life are non-uniform, e.g., motion of a bus on a road. When the bus starts, its speed is very slow, it gains speed for some time, and reaches a maximum value. Again, it slows down as it reaches near the next stop and finally stops there. Here the bus is covering different distances in equal intervals of time and hence it is not moving at a uniform speed. Such motions where distance travelled is not equal in equal intervals of time is called non-uniform motion. Similarly, motion of train, running athlete etc. are all examples of non-uniform motion.

Let us consider another example in which a car is moving on a busy road. It reaches a point A which is 20 metres from origin in 15 seconds and in next 15 seconds it reaches at point B, which is 60 metres from the origin. In next 15 seconds it reaches at point C which is 70 metres from the origin (Fig. 1.12).

In each case, car covers unequal distances in equal intervals of time and the motion is considered as the non-uniform. If we plot, the graph between distance-time, it will not be a straight line. It will be a curved path (the shape of the curve depends upon, the nature of. the motion) (Fig. 1.13).

Hope this helps!!