Here are the Rotational Motion Video Lectures for quick revision of complete chapter. Revise all the important formulae and key points. Know the tricks and tips to solve questions for JEE, NEET Exams.

The complete chapter comprises 4 Parts:

PART 4

**Introduction to System of Particles and rotational Motion**

A rigid body is a solid body of finite size in which deformation is negligible under the effect of deforming forces.

A rigid body is one in which the distances between different particles of the body do not change.

The centre of mass (COM) of a rigid body is the point in or near an object at which the whole mass of the object may be considered to be concentrated.

**Collision or impact:
**Collision is an isolated event in which a strong force acts between two or more bodies for a short time which results in a change in their velocities. A rigid object can be substituted with a single particle with mass equal to the total mass of the system located at the COM of the rigid object.

On the basis of energy, there are two types of collision-elastic collision and inelastic collision.

On the basis of line of impact, there are two types of collision-head-on collision and oblique collision.

**Conservation of linear momentum:** The total momentum of an isolated system remains constant. Momentum is conserved for an isolated system regardless of the nature of internal forces. Law of conservation of linear momentum is independent of the frame of reference.

### PART 1

Saransh Sir will be covering the following topics in this video in just 40 minutes:

- About Rigid Body
- Translational Motion of a Rigid Body
- Rotational Motion about Fixed Axis
- Translational Motion
- Pure Rotational Motion
- Combined Rotation & Translational Motion
- Kinetic Energy of Rigid Body performing Rotation
- Moment of Inertia – Continuous Mass Distribution
- Perpendicular Axis Theorem
- Parallel Axis Theorem
- Radius of Gyration (K)

### PART 2

Saransh Sir will be covering the following topics in this video in just 40 minutes:

- Cross Product (Vector Product)
- Properties of Cross Product
- Torque Explanation
- Torque Formulae & Numericals
- Condition for Equilibrium
- Force Couple
- Inertial Pulley
- Work energy theorem Applications
- Calculation of Hinge Force
- Work Energy Theorem
- Work Done in Terms of Torque

### PART 3

Saransh Sir will be covering the following topics in this video in just 30 minutes:

- Angular Momentum of Particle
- Conical Pendulum
- Angular Momentum of System of Particle
- Angular Momentum of Rigid Body Performing Pure Rotation About Fixed Axis
- Relation Between Torque and Angular Momentum
- Angular Momentum Conservation Principle
- Toppling
- Condition of Toppling

- Angular Impulse

### PART 4

Will be uploaded soon

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