Chapter 6: System of Particles and Rotational Motion
NCERT Class 11 Physics, Part I, Chapter 6. 7 lessons, 14 narrated 3D videos, 9 simulations and 14 quiz questions, following the textbook section by section.
- Centre of massThrow a cricket bat spinning into the air. Every point on it follows a messy, wobbly path.
- Vector productYou know the dot product: multiply two vectors and get a number. Now meet a product that gives a new vector.
- Angular velocity and rotational kinematicsA ceiling fan, a wheel on its axle, a door on its hinges. Each is a rigid body turning about a fixed axis.
- Torque and angular momentumPush a door near its hinges and it hardly moves. Push at the handle with the same force and it swings open easily.
- Equilibrium of a rigid bodyA book on a table, a ladder against a wall, a bridge over a river. These rigid bodies stay put. They are in mechanical equilibrium.
- Moment of inertiaSpin a bicycle wheel, then a solid disc of the same mass and size. The wheel is harder to get going, and harder to stop.
- Rotational dynamics and angular momentumPush a merry-go-round in a park. The harder you push, and the farther from the centre, the faster it speeds up.