Mechanical properties of solids pdf

Elasticity, plasticity, strength, abrasion, hardness, ductility, brittleness, malleability, and toughness are examples of mechanical qualities. At the end of the chapter, questions are posed to summarise the chapter's overall concepts and topics. Important concepts discussed in mechanical properties of solids class 11 notes, Solids' mechanical properties determine their numerous qualities, such as their resistance to deformation and their strength.

Resistance to deformation refers to an object's ability to resist a change in shape, whereas strength refers to an object's ability to withstand applied force. Or one, who want to learn and prepare from physics class 11 mechanical properties of solids notes pdf can refer to all different lectures and free content available.

Solids are defined by their size and shape. To modify the size and shape of a solid item, an external force is necessary. If the resistance to deformation is low, an object's shape can be easily modified. The qualities of solids that define their solidity are known as mechanical properties.

Plasticity, elasticity, strength, and ductility are some of these characteristics. Elasticity is described as the property of an object that allows it to restore its original shape and size once a force has been removed. For instance, if we stretch a rubber band to a certain length and then leave it, it will revert to its previous shape.

A Perfectly Elastic Body is described as a body that returns to its original shape and size completely and instantly after the deforming force has been eliminated. Phosphor bronze and quartz fibre, for example. Plasticity is the property of an object that causes it to change shape when a deforming force is applied and never returns to its previous shape once the deforming force is removed.

Ductility is a quality of an object that allows it to be pulled through thin wires, plates, or sheets. Consider the following scenario: Strength of Gold and Silver:. Strength is defined as the ability to withstand imposed stress without failing.

If a body is distorted as a result of an external force, an internal force is produced at each and every section of the body that attempts to restore the body to its original state. Stress is the name for this internal energy. A change in the length of an object occurs when it is subjected to longitudinal stress. Tensile force: Tensile stress is defined as an increase in the length of an object as a result of the applied force effect.

Compressional stress occurs when the length of an object decreases as a result of the applied force effect. When applied tangentially, the deforming force causes changes in the shape of the body.

Strain is defined as a change in the size and shape of a body caused by the application of a deforming force. Strain is defined as the proportion of a change in shape or size to the initial shape or size. It is nothing more than a number with no dimensions. Shearing strain is the measurement of the relative displacement on opposite faces of the body caused by shearing stress. Longitudinal strain is defined as the difference between the current length and the original length. The ratio of change in volume to the initial volume is what it's called.

Hooke's Law states that within the elastic limit, strain and stress are proportional to each other. The proportionality constant K, often known as the modulus of elasticity, is used here. Hooke's law is an empirical law that holds true for most materials. Some materials, such as human muscle and rubber, defy Hooke's law. A line created by stress and strain is known as the stress-strain curve.

A stress-strain curve for a material gives the relationship between stress and strain in the ideal case of Hooke's law. It's calculated by progressively adding load to a test coupon and measuring deformation, from which stress and strain may be calculated see tensile testing.

Many properties of a material are revealed by these curves, including Young's modulus, yield strength, and ultimate tensile strength. Strain is the amount of deformation experienced by the body in the direction of force applied, divided by the initial dimensions of the body.

The strain is a dimensionless quantity as it just defines the relative change in shape. A person's body can be stressed in one of two ways, depending on how much stress is applied:. Tensile strain is defined as a change in the length or area of a body caused by tensile tension. The change in length or area of a body caused by compressive strain is known as compressive strain.

Elastic Moduli: The ratio of strain and stress is known as the modulus of elasticity, or Elastic Moduli. It is one of the material's most fundamental features.

Young's modulus, Shear modulus, and Bulk modulus are the three forms of elastic moduli. Within the elastic limit, Young's Modulus of Rigidity is defined as the ratio of longitudinal stress to longitudinal strain.

Young's Modulus is represented by the letter Y. Metals have high Young Modulus values when compared to other materials. The ratio of normal stress to volumetric strain within the elastic limit is known as the Bulk Modulus of Rigidity.

It is represented by B. Importance of Mechanical Properties of Solids class All applicants preparing for entrance examinations such as JEE and NEET will benefit from the ncert solutions for class 11 physics chapter 9. Mechanical properties of solids notes, are particularly useful for revision when you are short on time and have a lot of material to cover.

Every year, they have posted at least two questions from properties of solids and liquids, as has been the case over the past five years. This is one of the most important chapters on the syllabus. So, if you have enough time, tackle solids before fluids because solids introduce us to new concepts such as stress, strain, potential energy, and strain relation.

These subjects aren't as important in fluids, but you should start with solids since if you miss a chapter in the middle, you'll end up with a backlog. Also to prepare the best one must refer to ncert solutions for class 11 physics chapter 9 and class 11 mechanical properties of solids notes combined.

If you have time constraints, then also you should do solids first as it is a small chapter which will not take much time of yours! Answer: It's a substance that can be stretched elastically to huge strain values t. Answer: It is defined as the ratio of the highest load applied to the wire to its original cross-sectional area. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning.

Unseen passages may contain one or many paragraphs. This is one of the important yet easy parts for a student to get marks. Students should thoroughly study and understand the passage to answer the related questions. The unseen passages are there just to test the The marks obtained in the board exam decide the college in which one can study.

In class 12 the syllabus of each and every subject increases vastly and it is difficult to cover up every point. In English also To score well, students must practice as per the new CBSE term-wise In order to select participants who will be featured in Pariksha Pe Charcha programme Ministry of Education, Govt of India vide letter No.

Ministry of Education, Govt. Multiple Choice Questions for Physics Gravitation. Multiple Choice Questions for Physics Atoms.

Multiple Choice Questions for Physics Nuclei. Multiple Choice Questions for Physics Thermodynamics.