The eternal battle between physicists and mathematicians in one perfect spring scale setup! While math folks would dive into equations calculating tension forces, a physicist just looks at this and thinks "duh, it's zero." The scale measures the difference in forces, not their sum. With identical 100N weights on both sides, they perfectly balance each other out. It's like watching someone use calculus to figure out if they can afford lunch when simple addition would do. The question mark above the scale is basically the universal symbol for "please stop overcomplicating this and just think about how forces work in real life for five seconds."