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Density

Physics: AQA GCSE Higher, topic 3.1.7

Density

Density is equal to mass divided by volume.

Density

Density

  • Density is given by ρ=m/V.
  • ρ is the Greek letter rho, not a p.
  • m is mass.
  • V is volume.
Upthrust

Upthrust

  • An object can float in a fluid.
  • The density of the object must be lower than the density of the fluid.
  • The force that keeps the object afloat is called upthrust.
Law of Displacement

Law of Displacement

  • The Law of Displacement applies to an object completely submerged in a fluid (like water).
  • The object will replace an amount of fluid equal to the object's own volume.

Test yourself on Density

  • Which of the following are true?

  • Which of these are true about calculating density?

  • Why did the air pockets inside the Titanic help it float before it hit the iceberg?

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