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Understanding fluids and pressure concepts

Forces and motion • Pressure in fluids

Key concepts

What you'll likely be quizzed about

  • A fluid is any substance that can flow.
  • This includes both liquids, such as water and oil, and gases, such as air.
  • Fluids have no fixed shape and will take the shape of their container.
  • Them being compressible or incompressible depends on their phase; gases are compressible, while liquids are generally incompressible.

Flashcards

Test your knowledge with interactive flashcards

What is the relationship between force and area in pressure?

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Pressure is directly proportional to force and inversely proportional to area; increasing force increases pressure.

Key notes

Important points to keep in mind

Fluids can be liquids or gases.

Pressure increases with depth in a fluid.

Pressure is force per area, calculated as P=F/A.

Gases are compressible; liquids are not.

Hydrostatic pressure depends on fluid density and depth.

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