Conservation of angular momentum

Science 🧪🔭, what a beauty it is

#science is #cool.

This is a best way to teach students, these students are lucky to have a teacher like him.

When you spin you won stop unless something stops you.

Spinning ice skater pulls arms in, spins faster. That's conservation of angular momentum: total spin stays constant unless outside forces act. Like a cosmic dance, objects keep twirling at the same rate, no matter how they shift, as long as no external torque interferes.

I loved doing this when I was a kid.

Exactly what you would expect a physics professor to look like.