Lesson 2: Moment of Inertia | Rotational Motion | Physics for JEE/NEET/Board by Anupam Panchal

Click on the link to access the complete video lecture series of all chapters, organized topic-wise and level-wise: Video Lecture Series. https://docs.google.com/spreadsheets/... In this session, Anupam Panchal explores the Moment of Inertia (MOI), a foundational concept in rotational mechanics. This lesson builds on the basics of rotational motion and introduces students to the concept of rotational mass, its calculation, and its role in various physical scenarios. Key Topics Covered: Understanding Moment of Inertia (I) Definition and physical significance of Moment of Inertia as the rotational analogue of mass in linear motion. Explanation of how MOI reflects an object’s resistance to changes in its rotational motion. Moment of Inertia Formula and Units SI units and dimensions of MOI. Factors Affecting Moment of Inertia Dependence of MOI on the mass distribution relative to the axis of rotation. How shape, size, and axis choice influence an object’s moment of inertia. Calculating MOI for Different Shapes Derivations of MOI for common geometrical shapes (e.g., rod, disc, ring, and sphere) with examples. Explanation of perpendicular and parallel axis theorems, with practical application in MOI calculations. Physical Interpretation and Examples Real-world examples to illustrate MOI, such as spinning ice skaters adjusting their speed by pulling in their arms. Explanation of why MOI is higher when mass is farther from the rotation axis. Importance of Moment of Inertia in Rotational Dynamics How understanding MOI is essential for solving complex rotational problems in JEE and NEET exams. Applications and Problem-Solving Strategies: Practical tips on how to approach MOI problems in competitive exams. Insight into how changing an object’s MOI affects its energy and speed in rotational dynamics problems. This lesson provides a clear framework for understanding how moment of inertia influences the dynamics of rotating bodies. With a mix of theory, formulas, and practical examples, Anupam Panchal ensures students gain a strong grasp of this critical concept, preparing them well for board exams and competitive tests.