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# Unit: System of particles and rotational motion (Hindi)

## Centre of mass (Hindi)

Learn what center of mass means, why it's useful, and how to calculate it.

## Introduction to rotational motion (Hindi)

Learn what angular displacement, angular velocity, and angular acceleration mean, as well as how they relate to their linear counterparts.

## Angular kinematics (Hindi)

Learn the relationships between angular displacement, angular velocity, and angular acceleration using the rotational kinematic formulas.

## Torque and equilibrium (Hindi)

Anyone who has ever opened a door has an intuitive understanding of torque. In this lesson, we'll explore why and how objects rotate using the concepts of torque and rotational equilibrium.

## Rotational inertia and angular second law (Hindi)

In this lesson, we'll learn how the distribution of mass can impact how easily the angular velocity can be changed around an axis. This property is called rotational inertia.

## Rotational kinetic energy (Hindi)

Does a baseball have more kinetic energy if it is spinning? In this lesson, we'll learn how to determine the rotational kinetic energy of an object so we can figure out how much more energy the baseball has.

## Angular momentum and angular impulse (Hindi)

In this lesson, we'll learn about angular momentum and angular impulse, and how these quantities are related to translational (or linear) momentum.

## Conservation of angular momentum (Hindi)

Angular momentum is constant where there is no net torque, just like how linear momentum is constant when there is no net force. In this lesson, we'll learn about the conservation of angular momentum and how to apply the new conservation law to solve problems.