“A penny dropped from a skyscraper can kill a person below.”

The dramatic image of a small coin, plummeting from a skyscraper and becoming a deadly projectile, is a persistent urban legend. This misconception likely stems from a natural intuition about gravity's relentless pull from extreme heights, leading many to assume immense, lethal force. Fictional portrayals, such as in "The Simpsons (Review)," have also amplified the idea of falling objects possessing exaggerated destructive power.

However, the laws of physics, specifically air resistance, debunk this dramatic claim. As an object falls through the atmosphere, it encounters drag. For a lightweight, flat object like a penny, this resistance quickly becomes significant. Instead of continuously accelerating, the penny reaches a point where air resistance balances gravity, known as terminal velocity.

For a penny, this terminal velocity is surprisingly slow, typically around 25 miles per hour. At this speed, the impact force is far from lethal. Its small mass and flat shape cause it to flutter as it descends, significantly reducing its impact force. Hitting someone would feel more like a sharp flick or a bee sting than a fatal blow, certainly not enough to cause serious injury or death. People commonly believe this myth because our everyday experience with falling objects doesn't involve the extreme heights where air resistance becomes the dominant force, making it counterintuitive to imagine an object stopping its acceleration.

This enduring myth illustrates how our intuitive understanding can diverge from scientific reality, proving that physics often defies initial expectations.