6.4 Moment of Inertia
Moment of inertia is the rotational equivalent of mass — it measures an object’s resistance to angular acceleration. In rigid body mechanics, it plays the same role that mass plays in linear dynamics. In this video, we’ll build your understanding from the ground up, starting with a warm-up question and progressing through key formulas, examples, and problem-solving strategies. 🔍 What You’ll Learn: Definition: 𝐼=∑𝑚𝑟^2 Moment of inertia for a point mass Standard formulas: disk, rod, hoop How distance from axis affects inertia Problem-solving tips for IB Physics exams 🎯 Perfect for: IB Physics HL & SL students Paper 1 and Paper 2 prep 2025 syllabus learners 💬 Question for You: Which object’s moment of inertia formula do you find hardest to remember — disk, rod, or hoop?
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