# NCERT Solutions for Class 11 Physics Chapter 9 Mechanical Properties Of Solids

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NCERT Solutions for Class 11 Physics Chapter 9 Mechanical Properties Of Solids: If a rubber band is stretched by applying a variable force after a particular force the rubber band brakes. The breakage happens when the applied force is beyond the elastic limit. To compare the elastic limit we use the term modulus of elasticity. The NCERT Solutions for Class 11 Physics Chapter 9 mainly deals with three terms stress, strain, and modulus of elasticity.

## The main content headings of the NCERT Solutions for Class 11 Physics Chapter 9 are given below:

9.1 Introduction

9.2 Elastic Behaviour Of Solids

9.3 Stress And Strain

9.4 Hooke’s Law

9.5 Stress-strain Curve

9.6 Elastic Moduli

9.7 Applications Of Elastic Behaviour Of Materials

Below are the important formulas of the NCERT Solutions for Class 11 Physics Chapter 9 Mechanical Properties Of Solids

• $Stress=\frac{Force}{Area}$

• HOOKE's LAW

$E=\frac{Stress }{Strain}$

$E= modulus \: of \: elasticity$

• longitudinal strain

The ratio of change in length to the original length.

• A wire of length L and radius r is clamped to a rigid support and a mass m is attached to the other end, then Young's modulus is

$Y=\frac{mgL}{\pi r^{2}\Delta l}$

L = Original length

$\Delta l$  = Change in length

mg = weight. Try to derive the above formula yourself

Below are a few questions for the practice of NCERT Class 11 Chapter 9 Mechanical Properties Of Solids:

The NCERT Solutions for Class 11 Physics Chapter 9 Mechanical Properties Of Solids are provided here

## NCERT Solutions for class 11 Physics

 Chapter-1 Physical world Chapter-2 Chapter-3 Chapter-4 Chapter-5 Chapter-6 Chapter-7 Chapter-8 Chapter-10 Mechanical Properties of Fluids Chapter-11 Chapter-12 Chapter-13 Kinetic Theory Chapter-14 Chapter-15

## NCERT Solutions for Class 11- Subject wise

 NCERT Solutions for Class 11 Biology NCERT Solutions for Class 11 Maths NCERT Solutions for Class 11 Chemistry NCERT Solutions for Class 11 Physics