1J20.25 • Stable, Unstable, and Neutral Equilibrium: Nine Nails on One

Photo shows the demonstration used at the University of Texas at Austin.

Instructions / Notes:

• 20 large nails are stacked so they balance on the head of single nail.
• Nine nails are hanging on each side, and two nails are horizontal, holding them in place.

Last updated on August 23, 2024