Volume, Mass, Density : Online IGCSE Physics Class


What is the relationship between volume, mass, and density? Look at the formula below to understand how these 3 terms relate to each other.

Some IGCSE Questions to my students

E.g. of density calculation

Given a mass of 25kg with the volume of 200 metre cube. Find the density of the object?

Mass =   25/200=0.125 kg metre cube


Question 1)

A rectangular block of wood has dimension of 240mm x 20.5 cm x 0.04 m. Find its volume ?


Volume rectangular = Length x width x height 

= 0.24 m x 0.205m x 0.04m

 0.001968 meter cube


Question 2)

A rectangular block of wood has a dimension of 2.4m x 2.5 m x 0.04 m. Find its density if the mass of the object is 10kg?


Volume = 2.4 x 2.5 x 0.04 = 0.24 meter cube

Density = mass / volume

Density = 10 / 0.24 = 41.67 kg metre cube


What is the application of density?

  • Oil and Water Don’t Mix. It’s a known fact that oil and water don’t mix, but what many people may not know is that the density of oil is what makes it float on top of water. …
  • Helium Balloons. …
  • Archimedes and Eureka! …
  • Icebergs.
  • Submarine

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