Pressure

• What is the definition of pressure?

  Force per unit of area
• How is pressure quantified?

  Using the formula: pressure = force/area
• If you apply 800 newtons of force to a nail head area of $0.0001 \text{ m}^2$, what is the pressure generated?


  8 million pascals
• What creates pressure in fluids?

  Collisions of particles with their surroundings
• What do we call the pressure generated by liquids and gases?

  Fluid pressure
• How does a gas create pressure in a container?

  Gas particles collide with the container walls
• How do water particles create pressure in a beaker?

  By colliding with the glass walls and air
• What is the significance of perpendicular force in pressure calculations?

  It determines the effective force generating pressure
• How does the angle of collision affect pressure generation?

  Perpendicular collisions generate more pressure
• What is the perpendicular force exerted on a $0.5 \text{ m}^2$ area by a pressure of $60 \text{ kPa}$?


  30,000 newtons
• How do you convert kilopascals to pascals?

  Multiply by 1000
• What is the formula to calculate force from pressure and area?

  • Force = Pressure × Area
  • Pressure must be in pascals
• What happens when two particles collide with a container wall at different angles?

  • Perpendicular collision: full force used
  • Angled collision: only a component of force used
• What are the two types of pressure discussed in the video?

  • Solid object pressure
  • Fluid pressure (liquids and gases)