Physics in the SAT!?

Even when taking a test such as the SAT, there is physics involved. I took the SAT today and I found out that there actually was some physics involved when you write with a number two pencil. For example, when you fill in the bubbles with your pencil, you are creating rotational motion, or uniform circular motion. This means that the speed while you are circling in the answers is constant. There is also a centripetal acceleration force directed inwards at all times that is equal to (mv^2)/r, the radius being the radius of the bubble. Another thing I realized is that there is also pressure involved. Pressure is equal to the force per unit area that is perpendicular to the surface of an object. When you exert a bigger force on the paper with your pencil and your pencil is perpendicular to paper, the mark on the paper will be dark. If you don't press as hard with your pencil and slant it so that it goes down at an angle less than 90 degrees, the mark on the paper will be lighter. So even when test taking, you can think of physics to make sure that you fill in the bubbles as dark as you can and as fast as you can without going out of the bubble.