This is a very common image that is seen in Mechanical Engineering. This picture represents how mechanical engineers use gears to make engines and machines operate. The photographer who took this picture is explaining how this gearset is an impossible system, and how engineering can make impossible contraptions become a reality. The simplicity of the borders and the background of the image help the viewer focus his/her attention toward the three gears that meet at the center of the picture. In addition, all three gears are identical, indicating that the conditions for the gearset are perfect and all forces are equal on each of the gears. This shows how engineers use physics to equalize the forces and strain amongst the various parts in a balanced, mechanical system, as well as how such a seemingly simple set of gears can be so complicated to design. This complexity in design is further evidenced by the great number of teeth found on each of the gears, as well as by each gear's high number of parts, including the evenly spaced ball bearings placed around the edges of the cylindrical centers belonging to each gear. Also, the photographer wants to make the viewer think about the image, and that's why he/she focuses the center of the image on the point at which the three gears mesh together. When the viewer of the image analyzes the gears in the photo, it becomes obvious that the three gears could never rotate freely, since the spin of one gear causes the second gear to rotate smoothly, but the third gear cannot rotate, because it experiences opposing forces that keep it in gridlock. This air of impossibility is only realized through expertise in the field of engineering, or by taking time to analyze the forces in the photograph, which indicates that the photographer directs his/her attention to an older, more educated audience. This is also interpreted by the common belief that older people are more wise and are more able to focus their attention on puzzling images that don't involve video games or computer screens. Also, the fact that the synchronized rotation of the gearset is impossible suggests that a knowledgeable viewer would try to figure out how to make the gearset work properly. Lastly, this image of a perplexing conundrum seems as if it would fit perfectly with the thought process of engineers, who strive to fix problems involving math and physics.