Liquid Pressure and Upthrust

• What primarily causes pressure on an object submerged in water?

  Surrounding water molecules colliding with it
• What happens to pressure as an object moves deeper in water?

  Pressure increases due to more water above
• What determines the pressure in a liquid?

  Density of the liquid and gravitational field strength
• What is the equation for pressure in a liquid?

  Pressure = height × density × gravitational strength
• What is up thrust in relation to submerged objects?

  It is the upward force from surrounding water
• Why does a submerged box experience a larger upward force on the bottom?

  Because the bottom is deeper than the top
• What determines whether an object floats or sinks?

  Comparison of up thrust and object's weight
• What happens if the weight of an object is larger than the up thrust?

  The object sinks
• How can we determine if an object will float without calculating up thrust?

  By comparing densities of the object and liquid
• What happens if an object is denser than water?

  The object will sink
• What happens if an object is less dense than water?

  The object will float
• What factors determine the pressure in a liquid?

  • Depth of the liquid
  • Density of the liquid
  • Gravitational field strength
• What is the relationship between up thrust and weight in determining if an object floats or sinks?

  • Up thrust acts upwards
  • Weight acts downwards
  • If up thrust > weight, it floats
  • If weight > up thrust, it sinks
• What is the significance of density in floating and sinking objects?

  • Denser objects sink
  • Less dense objects float
  • Density comparison with liquid is key