Here's why:
* Uniform circular motion means the particle is moving in a circle with a constant radius and constant speed.
* Speed is the magnitude of velocity, and it only refers to how fast the object is moving.
* Velocity is a vector quantity, meaning it has both magnitude (speed) and direction.
* In uniform circular motion, the direction of the velocity is constantly changing as the particle moves in a circle.
Therefore, although the speed is constant, the velocity is not because the direction is changing.
It's important to distinguish between speed and velocity when discussing circular motion.
