Question 1 Report
An object weighs 30N in air and 21N in water. The weight of the object when completely immersed in a liquid of relative density 1.4 is
Answer Details
Weight of water displaced = upthrust = 30 - 21 = 9NMass of water displaced = 910 9 10 = 0.9kgVolume of object = 9 × 10−4 − 4 m3 3 = (9 × 10−4 − 4 ) (1.4 ×103)
= 1.26kg = 12N30 - 12.6 = 17.4N
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