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  • An object weighs 10 N in air. When immersed fully in water, it weighs only 8 N. The weight of the liquid displaced by the object will be (a) 2 N (b) 8 N (c) 10 N (d) 12 N

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

(a) 2 N (b) 8 N (c) 10 N (d) 12 N

Answers (1)

A

Sol.

The weight of an object decreases when it is immersed in any fluid. This decrease in weight is caused due to buoyancy.

In any liquid the apparent weight (decreased weight) is given as:

Apparent weight = weight in air - buoyancy force

The force of buoyancy is equal to the weight of displaced liquid.

F_{b}=dVg

The given question, has an apparent weight equal to 8 kg and weight in air is equal to 10 kg.

Therefore, the weight of displaced liquid will be 2 kg.

Hence, the correct answer to this question is option A.

 

 

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infoexpert24

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