PPT: Mechanical Properties of Fluids | Physics for JEE Main & Advanced PDF Download

 Page 1


Mechanical Properties of Fluids
Mechanical Properties of Fluids
Page 2


Mechanical Properties of Fluids
Mechanical Properties of Fluids
Can you Recall?
How important are fluids in our life?
Fluid helps to protect and cushion joints and organs. Fluid helps to prevent dehydration.
Dehydration causes headaches, fatigue, confusion, and irritability. Fluid helps your kidneys work
to produce urine and remove waste from the body.
What is atmospheric pressure?
Atmospheric pressure, also known as barometric pressure, is the pressure within the atmosphere
of Earth.
Do you feel excess pressure while swimming underwater? Why?
You can feel an increase of pressure on your eardrums. This is due to an increase in hydrostatic
pressure, the force per unit area exerted by a liquid on an object. 
The deeper you go under the sea, the greater the pressure of the water pushing down on you.
Page 3


Mechanical Properties of Fluids
Mechanical Properties of Fluids
Can you Recall?
How important are fluids in our life?
Fluid helps to protect and cushion joints and organs. Fluid helps to prevent dehydration.
Dehydration causes headaches, fatigue, confusion, and irritability. Fluid helps your kidneys work
to produce urine and remove waste from the body.
What is atmospheric pressure?
Atmospheric pressure, also known as barometric pressure, is the pressure within the atmosphere
of Earth.
Do you feel excess pressure while swimming underwater? Why?
You can feel an increase of pressure on your eardrums. This is due to an increase in hydrostatic
pressure, the force per unit area exerted by a liquid on an object. 
The deeper you go under the sea, the greater the pressure of the water pushing down on you.
I n t r o d u c t i o n
Among three states of matter, i.e., solid, liquid and gas, a solid nearly maintains its fixed shape
and volume even if a large force is applied to it.
Liquids and gases do not have their own shape and they take the shape of the containing vessel.
A fluid means a substance that can flow. Therefore, liquids and gases, collectively, are called
fluids.
A fluid either has no rigidity or its rigidity is very low.
In our daily life, we often experience the pressure exerted by a fluid at rest and in motion.
Viscosity and surface tension play an important role in nature.
Page 4


Mechanical Properties of Fluids
Mechanical Properties of Fluids
Can you Recall?
How important are fluids in our life?
Fluid helps to protect and cushion joints and organs. Fluid helps to prevent dehydration.
Dehydration causes headaches, fatigue, confusion, and irritability. Fluid helps your kidneys work
to produce urine and remove waste from the body.
What is atmospheric pressure?
Atmospheric pressure, also known as barometric pressure, is the pressure within the atmosphere
of Earth.
Do you feel excess pressure while swimming underwater? Why?
You can feel an increase of pressure on your eardrums. This is due to an increase in hydrostatic
pressure, the force per unit area exerted by a liquid on an object. 
The deeper you go under the sea, the greater the pressure of the water pushing down on you.
I n t r o d u c t i o n
Among three states of matter, i.e., solid, liquid and gas, a solid nearly maintains its fixed shape
and volume even if a large force is applied to it.
Liquids and gases do not have their own shape and they take the shape of the containing vessel.
A fluid means a substance that can flow. Therefore, liquids and gases, collectively, are called
fluids.
A fluid either has no rigidity or its rigidity is very low.
In our daily life, we often experience the pressure exerted by a fluid at rest and in motion.
Viscosity and surface tension play an important role in nature.
Flu id
Any substance that can flow is a fluid.
Fluid is a phase of matter that includes liquids, gases, and plasmas.
An ideal fluid has the following properties:
It is incompressible: its density is constant. 1.
Its flow is irrotational: its flow is smooth, there are no turbulences in the flow. 2.
It is nonviscous: there is no internal friction in the flow. 3.
Its flow is steady: its velocity at each point is constant in time. 4.
Page 5


Mechanical Properties of Fluids
Mechanical Properties of Fluids
Can you Recall?
How important are fluids in our life?
Fluid helps to protect and cushion joints and organs. Fluid helps to prevent dehydration.
Dehydration causes headaches, fatigue, confusion, and irritability. Fluid helps your kidneys work
to produce urine and remove waste from the body.
What is atmospheric pressure?
Atmospheric pressure, also known as barometric pressure, is the pressure within the atmosphere
of Earth.
Do you feel excess pressure while swimming underwater? Why?
You can feel an increase of pressure on your eardrums. This is due to an increase in hydrostatic
pressure, the force per unit area exerted by a liquid on an object. 
The deeper you go under the sea, the greater the pressure of the water pushing down on you.
I n t r o d u c t i o n
Among three states of matter, i.e., solid, liquid and gas, a solid nearly maintains its fixed shape
and volume even if a large force is applied to it.
Liquids and gases do not have their own shape and they take the shape of the containing vessel.
A fluid means a substance that can flow. Therefore, liquids and gases, collectively, are called
fluids.
A fluid either has no rigidity or its rigidity is very low.
In our daily life, we often experience the pressure exerted by a fluid at rest and in motion.
Viscosity and surface tension play an important role in nature.
Flu id
Any substance that can flow is a fluid.
Fluid is a phase of matter that includes liquids, gases, and plasmas.
An ideal fluid has the following properties:
It is incompressible: its density is constant. 1.
Its flow is irrotational: its flow is smooth, there are no turbulences in the flow. 2.
It is nonviscous: there is no internal friction in the flow. 3.
Its flow is steady: its velocity at each point is constant in time. 4.
Fluid
Properties of Fluids:
They do not oppose deformation, they get permanently deformed.
They have ability to flow.
They have ability to take the shape of the container.
Fluids at Rest:
The branch of physics which deals with the properties of fluids at rest is called hydrostatics. In
the next few sections, we will consider some of the properties of fluids at rest.