Final answer:
The common cutting position for conveying motion with diagonal lines in art is by using zigzag patterns to depict movement. This technique guides the viewer's eye and stimulates a sense of dynamism in static images.
Step-by-step explanation:
When cutting diagonal lines to convey motion, the most common cutting position involves creating a zigzag pattern or direct angle that depicts the sense of movement effectively. This technique is used in various forms of visual arts to guide the viewer's eye through a piece, indicating motion or leading them towards a focal point. For example, diagonals in a composition can suggest the rapid movement of subjects or objects, much like zigzag lines bring us from top to bottom or bottom to top, as described in the reference provided.
By cutting a diagonal line, artists and designers create a visual path that mimics a there-and-back trip across a square, often representing a shortened or more dynamic route compared to horizontal or vertical lines. This kind of path can enhance the perception of movement within a two-dimensional space, making it a compelling tool in visual storytelling.