Which graph among the following represents uniform motion?
A body is said to be in uniform motion if it covers equal distances in equal intervals of time, no matter how small these time intervals are. In a way, we can say that in a uniform motion the speed remains constant. If we see the given options we can say that in graph A the speed of the body remains constant. In graph B the body is at rest which means that the body under consideration is having a constant velocity of 0 units or it is at rest. This is a special case of uniform motion. And in C as the steepness changes the speed of the body also changes. So options A and B are correct.