Скачать или смотреть Rotational Motion | Lecture 1 | Class 11 Physics | Free Education

Rotational Motion | Lecture 1 | Class 11 Physics | Free Education

Dear Students, in this video we are going to study a very important topic Rotational Motion from Class 11 Physics. Hope you find it helpful & interesting. Enjoy Learning!, This Video is applicable for all students who are study in CBSE, ICSE and doing preparation for IIT.

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Summary of Rotational Motion

Introduction
The lecture introduces a new chapter focused on "Rigid Body" and more commonly known as "Rotation." The speaker emphasizes the prevalence of rotational motion in everyday life and presents various examples to illustrate this concept.

Definition of Rigid Body
A *Rigid Body* is defined as a body in which the relative distance between any two points remains unchanged, even when forces are applied.
Examples include soft balls (which can change shape) versus hard balls (which maintain their shape).

Motion of Rigid Bodies
Rigid bodies can primarily move in two ways:
1. Translational Motion
This can be further divided into:
Rectilinear Translational Motion : All points move along straight lines.
Curvilinear Translational Motion : Points move along curved paths.
2. Rotational Motion
In this type of motion, points on the rigid body move in circular paths around an axis.

Characteristics of Motion
In translational motion, all points of the rigid body move in the same manner, while in rotational motion, points move in circular paths of varying radii.
The lecture discusses the importance of understanding the differences between these types of motion.

Axis of Rotation
The *Axis of Rotation* is defined as the line about which the body rotates. It is crucial to identify this axis to understand the motion of the rigid body.
The axis can be fixed or moving, and the lecture provides examples to illustrate both scenarios.

Precession
The movement of the axis of rotation about a fixed point is referred to as **Precession**. This concept is important in understanding the dynamics of rotating bodies.


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