Uniform circular motion is considered accelerated motion because the velocity of the object is constantly changing, even though the speed is constant.

Here's why:

* Velocity is a vector quantity: It has both magnitude (speed) and direction.

* In uniform circular motion, the direction of the velocity is constantly changing: As the object moves in a circle, its direction is always tangent to the circle. This means the velocity vector is constantly changing, even if the speed remains the same.

* Acceleration is the rate of change of velocity: Since the velocity is changing, there must be an acceleration present.

The direction of the acceleration in uniform circular motion is towards the center of the circle, which is known as centripetal acceleration. This acceleration is responsible for keeping the object moving in a circular path.

Here's a simple analogy: Imagine you're swinging a ball on a string in a circle. You feel the string pulling on your hand, and this force is what causes the ball to accelerate towards the center of the circle.

In summary, even though the speed is constant in uniform circular motion, the velocity is changing due to the changing direction. This change in velocity means there is an acceleration, specifically centripetal acceleration, acting on the object.