Fluid Pressure

• What is pressure defined as?

  Force per unit area
• Why can fluids flow?

  Because their particles are mobile
• What happens when fluid particles collide with surfaces?

  They exert a force on the surface
• What does a fluid mean in terms of pressure exertion?

  A force is exerted normal to a surface
• How can you calculate pressure at the surface of a fluid?

  Pressure = Force/Area
• What is density a measure of?

  Compactness of a substance
• How does density behave in a given liquid?

  It is uniform throughout the liquid
• What does a higher density in a liquid indicate?

  More particles in a given space
• What happens as the depth of a liquid increases?

  The number of particles above increases
• How does the weight of particles affect pressure at a certain depth?

  It adds to the pressure at that depth
• How can you calculate pressure at a certain depth?

  Pressure = hpg
• What does 'h' represent in the pressure formula?

  Height of the column of liquid
• What does 'g' represent in the pressure formula?

  Gravitational field strength
• What does 'ρ' (rho) represent in the pressure formula?

  Density of the liquid
• What are the units for density in the formula?

  kg/m³
• What are the units for gravitational field strength in the formula?

  N/kg
• What is the relationship between pressure and depth in a fluid?

  Pressure increases with depth