Class 11 Physics Ch 9

Mechanical Properties of Solid Class 11 Physics Ch 9 

Mechanical Properties of Solid Particles Class 11 Physics Ch 9  Prepared by Physics Wallah

Class 11 Notes Chapter 9 Revision Notes 
 Class 11th Physics Notes Quick Revision Notes chapter summary most important 11th Exam 
Question and Answers, Physics wallah alakh Pandey pdf notes Mechanical Properties of Solid CBSE Class XI Physics Solutions cbse guide medical Handwritten Notes cbse 

This chapter will provide an introduction to the fundamental concepts of stress, strain, and elastic modulus, as well as the application of Hooke's law. These principles enable us to predict the deformation that occurs when forces are applied to a physical body.

This chapter discusses different rules and notions related to solid bodies. Because the chapter is theoretically thick, students should first comprehend the concepts in order to memorize them correctly. Physics class 11 chapter 9 Solutions include examples to illustrate the ideas clearly and logically to increase knowledge. Students are encouraged to go through the notes for mechanical characteristics of solids class 11 on a frequent basis in order to maximize memory of the ideas and examples.

CBSE Class 11 Physics Revision Notes 2023-24 PDF Download

The Class 11 Physics revision notes, crafted by expert teachers with the latest CBSE Syllabus 2023-24 in mind, provide comprehensive clarity on important topics and concepts such as Work, Energy, and Power, Thermal Properties of Matter, Rotational Motion, Thermodynamics, Kinetic Theory, Mechanical Properties of Solid, and Laws of Motion.
Class 11 physics Chapter 9 Mechanical Properties of Solid is an important study material for the Students who are presently studying in CBSE 11th standard. The NCERT Results for Class XIth physics, give clear and precise answers  physics together that will help you to Understand the content completely. 

Key Notes for CBSE NCERT based Class 11th Physics

 The NCERT Results for Class 11 physics are matter experts according to the latest CBSE Syllabus 2023-24 and its marking schemes. Mechanical Properties of Solid   Physics Class twelve NCERT PDF can come easy to understand  while preparing notes and during  different Exams. Class 11 physics Chapter 9  from the link attached below at free or no cost. 
We offer complimentary access to Toppers' Notes for all chapters of Class XI Physics, available in PDF format. These notes serve as a valuable resource for students seeking to revise quickly during exams, as they contain key concepts and important topics in a concise and useful summary format.

Solids and their mechanical properties

• Mechanical Properties of solids describe characteristics such as their strength and resistance to deformation,

• It describes about the ability of an object to withstand the stress applied to that object. Objects also resist changing their shape.

Mechanical properties:-

1. Elasticity: - Elasticity is a property by virtue of which original shape is regained once the external force is removed.

• This means it tells us how much elastic a body is

⚫ For example:- A spring. If we stretch a spring it changes its shape and when the external force is removed spring comes back to its original position

2. Plasticity: - Plasticity is reverse of elasticity.

⚫ Property means permanent deformation

• The object never regains its original shape even when the external force is removed. These types of objects are called as plastics. For example:- Toys, Buckets made up of plastics

3. Ductility: - Property of being drawn into thin wires For Example:- Small chains of gold and

4. Strength: - Ability to withstand applied stress without failure.

Whenever we apply an external force on the body to change its shape there is a restoring force add in the opposite direction Where Fostering force develops in the body because of force we apply. 

Types of Stress

▷ Longitudinal stress: Longitudinal stress is defined as restoring force per unit is applied to the cross-sectional area of the cylindrical body.

• This restoring force per unit area is known as longitudinal stress

Experimentally we can observe the increase in length. If we tie a heavy object to the cylinder with the help of threads.

Let Initial length of the cylinder is L.

⚫ After it gets stretched its length increases by AL due to the stress, • As there is change in the length therefore this type of stress is known 
as longitudinal stress

 Types of Longitudinal Stress:-

1. Tensile Stress

2: Compressive Stress

Force is applied on both the sides as a result length of cylinder increases Compressive Stress: Compressive stress is a longitudinal stress are the force is applied to compress the cylinder.

Tensile Stress:
 Tensile stress is a longitudinal stress when the length of the cylinder increases 
For example:- When the force is applied to both sides of the cylinder, the cylinder gets stretched. As Tangential or Shearing Stress: Restoring force per unit area when the force applied is parallel to the cross sectional area of the body  For example:- When the force is applied to both sides of the cylinder, the cylinder gets stretched. As a result there will be increase in its length.

Force is applied on both the sides as a result length of cylinder increases point

Compressive Stress: Compressive stress is a longitudinal stress in the force is applied to compress the cylinder.

Tangential or Shearing Stress: Restoring force per unit area when the force applied is parallel to the cross sectional area of the body

• Relative displacement occurs between of the body

Hydraulic Stress: Hydraulic stress is the restoring force per unit area when force is applied by a

• For example:-Consider a rubber ball and if it is dipped in the pond Due to the pressure of water from all directions force acts on the ball as a result, the ball seems to be slightly contracted,

⚫ Because of the force exerted by the water there is restoring force which develops in the ball which is equal in magnitude to the force applied by the water but in opposite direction,

This type of stress is known as hydraulic stress.

Strain: It is a measure of deformation representing the displacement between particles in the body to a reference length.

• It tells us how and what changes takes place when a body is subjected to strain.

Mathematically: Strain AL/L, where AL-change in length L= original length

• It is dimensionless quantity because it is a ratio of two quantities:

⚫ For example: - If we have a metal beam and we apply force from both sides the shape of the metal beam will get deformed

• This change in length or the deformation is known as Strain,

Types of Strain:
• If we apply longitudinal stress to a body either the body elges compresses this change along the length of the body. This change i length is measured by Longitudinal Strain. body due to the longitudinal

Longitudinal Strain: Change in length to the original length of the stress.

Longitudinal Strain = ALL

• Strain occurs as a result of stress,

> Shearing Strain: Shearing strain is the measure of the relative displacement of the opposite faces displacement between the apposite faces of the body. 
⚫ Shearing strain measure to what extent the two opposite of the body as a result of shearing stress

• If we apply force parolle the crees-sectional area because of which there was relative

Volume Strain: Volume strain is defined as ratio of change in volume to the original volume as a result of the hydraulic stress  

We kindly request you to share our website, which offers exceptional educational content for students. Our team has meticulously curated notes from reputable education websites and online classes to augment your comprehension. We suggest exploring Physics Wallah's application or website for study materials and test papers. Additionally, Alakh Pandey, a distinguished physics and chemistry teacher, has contributed to our collection of the finest physics and chemistry content for class 11th and 12th, which is particularly beneficial for IIT JEE and NEET preparation aspirants.

Post a Comment