Pressure ( solids, liquids , gases

• Pressure


  Force applied over an area
• Pressure units


  Newtons/m² (N/m²) - Pascal (Pa)
• Small area


  High pressure
• Large area


  Low pressure
• Pressure


  • Depends on force and area
• Pressure in gases


  Caused by gas particles colliding with the sides of their container
• Pressure in liquids


  Increases with depth due to the weight of the liquid above
• Water escaping from deeper holes travels faster due to stronger force pushing it
• Gravity pulls air particles towards Earth, so pressure is higher closer to sea level