Why does a knot stay tied?
The Knot's Clever Trap
Why does a knot stay tied?
You tie your shoes in the morning, and hours later — through running, jumping, kicking a ball — the knot is still there, holding tight. How does a simple loop of string remember to stay tangled? What's grabbing it from the inside?
The secret isn't magic — it's friction. When two surfaces press together, tiny bumps and valleys on each one catch against the other, resisting any sliding motion. Rub your palms together fast and you'll feel friction fighting back as heat. Now imagine that same catching force, but between a rope and itself.
