Question

Question 53:
An object weighs 500 grams in air. This object is then fully immersed in water. State whether it will weigh less in water or more in water. Give reason for your answer.

Lakhmir Singh Physics Class 9

Answer 1

The density of the object will be less in water than air . archimedis principle states that the upward force exerted by a fluid on the object is equal to the weight force of the fluid displaced by the object. In air there is an upward force on it equal to the weight of the aircolumn displaced by it which is very little.
the displaced water is considerable in weight so the buoyant force is larger and the net force is smaller. for which reason weight is less in water