Q11 of 11 Page 268

A piece of iron of density 7.8 × 103 kgm–3 and volume 100 cm3 is totally immersed in water. Calculate

(a) The weight of the iron piece in air


(b) The up thrust


(c) Apparent weight in water

(a) 7.8N (b) 1N (c) 6.8 N


Given,


Density of iron



Volume of iron piece




We know,


Density of water



(a)




(b) Up thrust is the buoyant force exerted by water





(c) Apparent weight in water



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