Physics Uncovered on Instagram: "When the professor spins with the weights held far from his body, he rotates slowly. But the moment he pulls the weights inward, his rotation suddenly speeds up — without him pushing harder or adding any extra energy. That jump in speed comes from one of physics’ most elegant principles: the conservation of angular momentum. 🌀⚙️ Here’s what’s happening: • With the weights far out, his mass is spread over a larger distance. That gives him a large rotational inert