Question

An object weight 10N in air.When immersed fully in water, it weighs only 8N.The weight of liquid displaced by the object will be

Answer 1

any object immersed wholly or partially in a fluid buoys up. a force' equal to the weight of the fluid displaced by the object

Answer 2

Weight of the block in air = 10N
weight in water = 8N

weight of liquid displaced = ​Weight of the block in air - ​weight in water
weight of liquid displaced = 10-8 = 2N

The principle used is Archemedes principle. When a body is immersed fully or partially in a fluid, it experiences an upward force that is equal to the weight of the fluid displaced by it