The pressure per unit area of an object is called pressure, and the symbol is P. Pressure is used to compare the effect of pressure. The greater the pressure, the more obvious the effect of pressure. The calculation formula of pressure is: pressure = pressure/stressed area, that is, p=F/S, the unit of pressure is Pascal, abbreviated as Pa, and the unit is Pa. The methods of increasing pressure are: increasing pressure under the condition of constant stress area, reducing stress area under the condition of constant pressure, or reducing stress area while increasing pressure. The methods of reducing pressure are: reducing pressure under the condition of constant stress area, increasing stress area under the condition of constant pressure, or increasing stress area while reducing pressure.
The liquid exerts pressure on the side wall and bottom of the container, and the pressure increases with the increase of liquid depth.