Chapter 6 • Class 11 Physics
System of Particles and Rotational Motion
Class 11 Physics (NCERT) notes on centre of mass, torque, moment of inertia, angular momentum and rolling motion, with solved numericals, quizzes and tests.
Study by topic — one focused page each
1
Centre of Mass
A rigid body has countless particles, yet it moves as if its entire mass were concentrated at a single point. That point is the centre of mass (CM) . …
Start this topic → 2Torque, Moment of Inertia & Angular Momentum
Force makes things move; torque makes things turn. The turning effect of a force about an axis is called torque (or moment of force). It depends not j…
Start this topic → 3Rotational Dynamics & Rolling
Just as governs straight-line motion, an exactly parallel law governs rotation. A net torque produces angular acceleration in direct proportion to the…
Start this topic →Chapter-wide tests
Online Test
18 MCQ • 15 min
IMO / Olympiad Practice
Olympiad level • 15 min
📝 Full Chapter Test (Download & Print)
40 marks • 90 min • with answer key