In The Uniform Circular Motion The Velocity Vector Has Direction. In physics, uniform circular motion describes the motion of a body traversing a circular path at constant speed.since the body describes circular motion, its distance from the axis of rotation. (b) velocity vectors forming a triangle.
In uniform circular motion, speed is constant. (a) a particle is moving in a circle at a constant speed, with position and velocity vectors at times t and t + δ t. It has only radial acceleration ar = rv2 [directed towards center] and its velocity is always in tangential.