What is Thrust?
The force acting on an object perpendicular to the surface.
What is pressure?
The thrust on unit area is called pressure.
Mathematical representation of Pressure.
P=F/A
Pressure is a ____ quantity.
Scalar
SI unit of pressure?
N/m² or N/m-²(Pascal)
Who is The unit Pascal named after?
Scientist Blaise Pascal.
What is Pascal denoted as?
Pa
1 Pa=??
1Pa= 1N/m²
What is a fluid?
It is any substance that has no definite shape and has ability to flow.
What is a fluid?
It is any substance that has no definite shape and has ability to flow.
What did Blaise Pascal observe?
The pressure in a fluid at rest is the same at all points if they are at same height.
What is a hydraulic lift?
The pressure is same on both sides of the enclosed fluid, allowing a small force to lift a heavy object.
What is the mathematical representation of hydraulic lift?
P=F1/A1=F2/A2
What is density of a substance?
The density p of a substance is defined as its mass per unit volume.
What is mathematical representation of density?
P=m/V
(v is volume)
What is SI unit of density?
Kg/m³
Cgs unit of density.
g/m³
What does density depend on?
The distance between molecules and atoms. The greater the distance, the smaller the density.
What is Relative Density (R.D)?
The relative density of a substance is the ratio of its density to the density of water.
What is R.D also called as?
Specific gravity
Mathematical representation of R.D?
R.D=Ps/Pw
(s is substance and w is water)
What is the unit of R.D?
SI unit=(kg/m³)/(kg/m³)=unitless
If we make two holes in two containers containing liquid with same height?
P2-P1=Pgh
Which substance has highest density?
Mercury. 13.6×10³ kg/m³
