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Water Pressure Formula

Water pressure is a term that describes the water flow strength through a channel or pipe. Water Pressure formula is given by,
Water Pressure Formula
Where,
P is the water pressure,
$\rho$ is the density of water,
g is gravitational force,
h is the height
Water pressure loss due to height h is
Formula for Water Pressure
Where, h is the height

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Water Pressure Examples

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Lets see some examples on water pressure:

Solved Examples

Question 1: The tank of height 3 m is filled with the water. what will be the pressure on the tank at its bottom.
Solution:
 
Given: Density of water $\rho$ = 1000 kg/m3, acceleration due to gravity g = 9.8 m/s2, height h = 3m

The water pressure on the tank is
P = $\rho$ g h
  = 1000 kg/m3 $\times$ 9.8 m/s2 $\times$ 3m
  = 29400 Pascal.
 

Question 2: A falls has the height of 100 m. Calculate the pressure loss when it reaches the surface.
Solution:
 
Given: Density of water $\rho$ = 1000 kg/m3, acceleration due to gravity g = 9.8 m/s2, height h = 100 m

The pressure loss is given by
Pressure loss = 0.4335 $\times$ 100 m
                     = 43.35 Pascal.

 

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