NCERT Class 11 Physics Part 2 Mechanical Properties Of Fluids

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Read and download NCERT Class 11 Physics Part 2 Mechanical Properties Of Fluids 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 10 Mechanical Properties of Fluids

Class 11 Physics students should refer to the following NCERT Book Chapter 10 Mechanical Properties of Fluids in Class 11. This NCERT Book for Class 11 Physics will be very useful for exams and help you to score good marks

Chapter 10 Mechanical Properties of Fluids NCERT Book Class 11

10.1 INTRODUCTION
In this chapter, we shall study some common physical properties of liquids and gases. Liquids and gases can flow and are therefore, called fluids. It is this property that distinguishes liquids and gases from solids in a basic way. Fluids are everywhere around us. Earth has an envelop of air and two-thirds of its surface is covered with water. Water is not only necessary for our existence; every mammalian body constitute mostly of water. All the processes occurring in living beings including plants are mediated by fluids. Thus understanding the behaviour and properties of fluids is important.
How are fluids different from solids? What is common in liquids and gases? Unlike a solid, a fluid has no definite shape of its own. Solids and liquids have a fixed volume, whereas a gas fills the entire volume of its container. We have learnt in the previous chapter that the volume of solids can be changed by stress. The volume of solid, liquid or gas depends on the stress or pressure acting on it. When we talk about fixed volume of solid or liquid, we mean its volume under atmospheric pressure. The difference between gases and solids or liquids is that for solids or liquids the change in volume due to change of external pressure is rather small.
In other words solids and liquids have much lower compressibility as compared to gases.
Shear stress can change the shape of a solid keeping its volume fixed. The key property of fluids is that they offer very little resistance to shear stress; their shape changes by application of very small shear stress. The shearing stress of fluids is about million times smaller than that of solids.
 
10.2 PRESSURE
A sharp needle when pressed against our skin pierces it. Our skin, however, remains intact when a blunt object with a wider contact area (say the back of a spoon) is pressed against it with the same force. If an elephant were to step on a man’s chest, his ribs would crack. A circus performer across whose chest a large, light but strong wooden plank is placed first, is saved from this accident. Such everyday experiences convince us that both the force and its coverage area are important. Smaller the area on which the force acts, greater is the impact. This impact is known as pressure.
When an object is submerged in a fluid at rest, the fluid exerts a force on its surface. This force is always normal to the object’s surface. This is so because if there were a component of force parallel to the surface, the object will also exert a force on the fluid parallel to it; as a consequence of Newton’s third law. This force will cause the fluid to flow parallel to the surface. Since the fluid is at rest, this cannot happen. Hence, the force exerted by the fluid at rest has to be perpendicular to the surface in contact with it. This is shown in Fig.10.1(a).
The normal force exerted by the fluid at a point may be measured. An idealised form of one such pressure-measuring device is shown in Fig. 10.1(b). It consists of an evacuated chamber with a spring that is calibrated to measure the force acting on the piston. This device is placed at a point inside the fluid. The inward force exerted by the fluid on the piston is balanced by the outward spring force and is thereby measured.

 

NCERT Class 11 Physics Part 2 Mechanical Properties Of Fluids

 

 

 

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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 10 Mechanical Properties of Fluids

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NCERT Book Class 11 Physics Chapter 10 Mechanical Properties of Fluids

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Chapter 10 Mechanical Properties of Fluids NCERT Book Class 11 Physics

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Class 11 Chapter 10 Mechanical Properties of Fluids NCERT Book Physics

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