This model is designed for the study of kinematics of uniform circular motion. The velocity of a moving body is graphically represented along the X and Y axes. The coordinates of the body x, y and the components of its velocity v_{x} and v_{y} change in time under the harmonic law with the period T = 2π/ω, where ω is the angular frequency. Observe the influence of the change in the radius R of the circle and of the value of the speed v of the body on the angular frequency.