Composition refers to the organization, arrangement, and combination of objects within the borders of a drawing space. For a great drawing, you want to bring the eyes of the viewer toward your center of interest within an aesthetically pleasing composition.
The idea that clockwise motion represents the forward motion of time so powerful that it's hard to look at such a watch or clock without having the slightly unsettling feeling that time is running backwards.
This acceleration is called centripetal acceleration. the radius, the less rapidly the velocity changes direction. vector always points in the direction of the motion (tangent to the circular path). circular motion, Velocity and centripetal acceleration are always perpendicular to each other.