Natural gut tennis racket strings: The history, myths and why it's the best

Intermediate Axis Theorem - Intuitive Explanation

ECG Axis Interpretation

This video explores a remarkable moment from 1985, when Soviet cosmonaut Vladimir Dzhanibekov noticed an unexpected behavior while tossing a handle-like object aboard a space station. Instead of spinning smoothly, the object repeatedly flipped 180 degrees while rotating — something that looked almost impossible. What Dzhanibekov observed turned out to be a perfect physical demonstration of the tennis racket theorem, a principle in rotational dynamics that predicts instability when an object spin

Tennis Racket Theorem (Dzhanibekov Effect)—SystemModeler Model