Pressure in a Fluid

• A fluid can either be a liquid or a gas
• What is pressure caused by?

  Particles colliding with a surface
• As particles move around a fluid, what do they do?

  They collide with the surface of objects in the fluid or the surface of the container
• When collisions occur in a fluid, what do they create?

  They create a force normal (at right angles) to the surface
• What is the equation for pressure?

  pressure = force (normal to a surface) / area (of that surface)
• If a pressure acts on a bigger area , it will produce a bigger force
• Pressure is measured in pascals (Pa)
• Force is measured in newtons (N)
• Area is measure in metres squared (m²)