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Q.

An object weighs 10 N in the air. When it is immersed in water, it displaces 0.2 kg of water. Taking = 10 m/s2.The weight of the object in water is [[1]] N.


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Detailed Solution

An object weighs 10 N in the air. When it is immersed in water, it displaces 0.2 kg of water. Taking = 10 m/s2.The weight of the object in water is 8 N.
Given data and assumptions:
Mass of water displaced = 0.2 kg
Weight of water displaced = 0.2 × g 
= 0.2 × 10 N
= 2 N
Buoyant force acting on the body = Weight of water displaced
                                                      = 2 N
Weight of object in water = Weight of object in air - buoyant force
= 10 -2 N
= 8 N
 
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