Fluids are the substances which can flow e.g., gases and liquids are fluids. Archimedes’ principle is based on the upward force exerted by fluids on any object immersed in the fluid.

Hence it is applicable only for fluids.

Applications of Archimedes’ principle:

• It is used in designing of ship and submarine.
• It is used in designing lactometer, used to determine the purity of milk,

To make hydrometers, used to determine the density of liquids.