NCERT Class 11 Physics Part 2 Mechanical Properties Of Solids

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Read and download NCERT Class 11 Physics Part 2 Mechanical Properties Of Solids in NCERT book for Class 11 Physics. You can download latest NCERT eBooks chapter wise in PDF format free from Studiestoday.com. This Physics textbook for Class 11 is designed by NCERT and is very useful for students. Please also refer to the NCERT solutions for Class 11 Physics to understand the answers of the exercise questions given at the end of this chapter

NCERT Book for Class 11 Physics Chapter 9 Mechanical Properties of Solids

Class 11 Physics students should refer to the following NCERT Book Chapter 9 Mechanical Properties of Solids in Class 11. This NCERT Book for Class 11 Physics will be very useful for exams and help you to score good marks

Chapter 9 Mechanical Properties of Solids NCERT Book Class 11

9.1 INTRODUCTION
In Chapter 7, we studied the rotation of the bodies and then realised that the motion of a body depends on how mass is distributed within the body. We restricted ourselves to simpler situations of rigid bodies. A rigid body generally means a hard solid object having a definite shape and size. But in reality, bodies can be stretched, compressed and bent. Even the appreciably rigid steel bar can be deformed when a sufficiently large external force is applied on it. This means that solid bodies are not perfectly rigid.
A solid has definite shape and size. In order to change (or deform) the shape or size of a body, a force is required. If you stretch a helical spring by gently pulling its ends, the length of the spring increases slightly. When you leave the ends of the spring, it regains its original size and shape. The property of a body, by virtue of which it tends to regain its original size and shape when the applied force is removed, is known as elasticity and the deformation caused is known as elastic deformation. However, if you apply force to a lump of putty or mud, they have no gross tendency to regain their previous shape, and they get permanently deformed. Such substances are called plastic and this property is called plasticity. Putty and mud are close to ideal plastics.
The elastic behaviour of materials plays an important role in engineering design. For example, while designing a building, knowledge of elastic properties of materials like steel, concrete etc. is essential. The same is true in the design of bridges, utomobiles, ropeways etc. One could also ask — Can we design an aeroplane which is very light but sufficiently strong? Can we design an artificial limb which is lighter but stronger? Why does a railway track have a particular shape like I? Why is glass brittle while brass is not? Answers to such questions begin with the study of how relatively simple kinds of loads or forces act to deform different solids bodies. In this chapter, we shall study the elastic behaviour and mechanical properties of solids which would answer many such questions.
 
9.2 ELASTIC BEHAVIOUR OF SOLIDS
We know that in a solid, each atom or molecule is surrounded by neighbouring atoms or molecules. These are bonded together by interatomic or intermolecular forces and stay in a stable equilibrium position. When a solid is deformed, the atoms or molecules are displaced from their equilibrium positions causing a change in the interatomic (or intermolecular) distances. When the deforming force is removed,the interatomic forces tend to drive them back to their original positions. Thus the body regains its original shape and size. The restoring mechanism can be visualised by taking a model of spring-ball system shown in the Fig. 9.1. Here the balls represent atoms and springs represent interatomic forces.

NCERT Class 11 Physics Part 2 Mechanical Properties Of Solids

 

 

 

Click on the below link to download NCERT Class 11 Physics Part 2 Mechanical Properties Of Solids

Chapter 01 Physical World
NCERT Class 11 Physics Part 1 Physical World
Chapter 02 Units and Measurement
NCERT Class 11 Physics Part 1 Units And Measurement
Chapter 03 Motion in a Straight Line
NCERT Class 11 Physics Part 1 Motion In A Straight Line
Chapter 04 Motion in a Plane
NCERT Class 11 Physics Part 1 Motion In A Plane
Chapter 05 Laws of Motion
NCERT Class 11 Physics Part 1 Laws Of Motion
Chapter 06 Work Energy and Power
NCERT Class 11 Physics Part 1 Work Energy and Power
Chapter 07 System of Particles and Rotational Motion
NCERT Class 11 Physics Part 1 Systems Of Particles and Rotational Motion
Chapter 08 Gravitation
NCERT Class 11 Physics Part 1 Gravitation
Chapter 09 Mechanical Properties of Solids
NCERT Class 11 Physics Part 2 Mechanical Properties Of Solids
Chapter 10 Mechanical Properties of Fluids
NCERT Class 11 Physics Part 2 Mechanical Properties Of Fluids
Chapter 11 Thermal Properties of Matter
NCERT Class 11 Physics Part 2 Thermal Properties Of Matter
Chapter 12 Thermodynamics
NCERT Class 11 Physics Part 2 Thermodynamics
Chapter 13 Kinetic Theory
NCERT Class 11 Physics Part 2 Kinetic Theory
Chapter 14 Oscillations
NCERT Class 11 Physics Part 2 Oscillations
Chapter 15 Waves
NCERT Class 11 Physics Part 2 Waves
Other Chapters
CBSE Class 11 Physics Elastic and Inelastic
CBSE Class 11 Physics Errors in Measurement
CBSE Class 11 Physics Motion in a Vertical Circle
CBSE Class 11 Physics Non Conservative Forces
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Physics NCERT Book Class 11 Chapter 9 Mechanical Properties of Solids

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NCERT Book Class 11 Physics Chapter 9 Mechanical Properties of Solids

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Chapter 9 Mechanical Properties of Solids NCERT Book Class 11 Physics

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Class 11 Chapter 9 Mechanical Properties of Solids NCERT Book Physics

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