News - Daring Physics Lesson: Bed of Nails and Breaking Blocks

In a classroom filled with curiosity and cautious excitement, Professor Vahe Peroomian of USC Dornsife captivates his students with a daring demonstration. The soft-spoken professor has made it a tradition to illustrate lessons in physics using eye-catching and risky methods. On this occasion, he lies confidently upon a bed of pointed nails. With eyes set on Peroomian, students watch in suspense as another spiky plank is placed over his chest, ready to bear the weight of a solid cinder block. As anticipation mounts, the students hold their breath, their phones poised to capture every moment. An assistant, wielding a hammer, approaches and unleashes a mighty swing, shattering the block into pieces. The room erupts with gasps and applause as Peroomian emerges unscathed, standing up with a triumphant grin. "Physics can be fun," he assures. For over twenty years, Peroomian has used this spectacle as a cornerstone of his lessons in Physics 151: Mechanics and Thermodynamics. The bed of nails demonstration effectively illustrates the principles of pressure and inertia, key concepts in his curriculum for aspiring scientists and engineers. By distributing his weight across numerous nails, no single point bears enough pressure to pierce his skin, while the inertia of the solid block effectively absorbs the hammer's force, protecting him from harm. "The pressure of teaching isn't as daunting as the weight of the cinder block," he jokes. This engaging method of teaching leaves an indelible mark on students, encouraging them to grasp complex theories through practical application. While many may not remember every formula, they will never forget the day their physics professor lay on a bed of nails, turning theoretical physics into reality.