Pressure in Fluids

8.1 Pressure in Fluids
 

Pressure in Fluids

 
Pascal's principle

Pascal's principle states that the transmission of pressure exerted on a fluid (liqiod or gas) in an enclosed system is uniform throughout the fluid and in all directions.

 

 

Operating principle of hydraulic system
  • The transmission of pressure on all directions 
  • The hydralic system is made up of 2 cylindrical pistons of different surface areas
  • The fluid is water or oil
  • Pressure exerted by the small piston is the same as the pressure produced at the large piston 

Pressure at small piston = Pressure at large piston

\(\frac{\text{Input force}}{\text{Area of small piston}}\)\(= \frac{\text{Onput force}}{\text{Area of large piston}}\)

Pascal's Principle

Application of Pascal's Principle in daily life
  • Hydralic jack system
  • Hydralic breake system
  • Dental chair
 
Bernoulli's principle

Bernoulli's principle: when the fluid flows through the narrow part, its velocity increases and the pressure in that region decreases

 
Application of Bernoulli's principle in daily life
  • Aerofoil-shaped wings of an aeroplane
  • Bunsen burner
  • Helicopter
  • Drone
  • Safety lines nearby tracks at railway station

 

Pressure in Fluids

8.1 Pressure in Fluids
 

Pressure in Fluids

 
Pascal's principle

Pascal's principle states that the transmission of pressure exerted on a fluid (liqiod or gas) in an enclosed system is uniform throughout the fluid and in all directions.

 

 

Operating principle of hydraulic system
  • The transmission of pressure on all directions 
  • The hydralic system is made up of 2 cylindrical pistons of different surface areas
  • The fluid is water or oil
  • Pressure exerted by the small piston is the same as the pressure produced at the large piston 

Pressure at small piston = Pressure at large piston

\(\frac{\text{Input force}}{\text{Area of small piston}}\)\(= \frac{\text{Onput force}}{\text{Area of large piston}}\)

Pascal's Principle

Application of Pascal's Principle in daily life
  • Hydralic jack system
  • Hydralic breake system
  • Dental chair
 
Bernoulli's principle

Bernoulli's principle: when the fluid flows through the narrow part, its velocity increases and the pressure in that region decreases

 
Application of Bernoulli's principle in daily life
  • Aerofoil-shaped wings of an aeroplane
  • Bunsen burner
  • Helicopter
  • Drone
  • Safety lines nearby tracks at railway station