Question

Describe an experiment to verify the Archimedes' principle. 

Answer 1

Let us take a solid and suspend it by a thin thread from the hook of a spring balance and note its weight .

Then take a eureka can and fill it with water up to its spout. Arrange a measuring cylinder below the spout of the eureka can as shown. Immerse the solid gently in water. The water displaced by the solid gets collected in the measuring cylinder.

When water stops dripping through the spout, note the weight of the solid and volume of water collected in the measuring cylinder.

From diagram, it is clear that

Loss in weight (Weight in air – weight in water) = 300 gf – 200 gf = 100 gf

Volume of water displaced = Volume of solid = 100 cm³

Because density of water = 1 gcm^-3  

Weight of water displaced = 100 gf = Upthrust or loss in weight

This verifies Archimedes' principle.