A block of mass 3.5kg displaces 1000cm3 of water when fully immersed inside it. Calculate:
(i) the volume of the body, (ii) the upthrust on the body, and (iii) the apparent weight of the body in water.
Given:
Mass of block = 3.5kg => weight of the body = 3.5kgf
The volume of the water displaced when completely immersed in water = 1000cm3
(i) To find the volume of the body when completely immersed in a liquid is equivalent to the volume of the water displaced
Volume of the block = 1000 cm3 or 0.001m3
(ii) Upthrust acting on the body = volume of the body x density of water x g
= 0.001 x 1000 x g = 1 kgf
(iii) The apparent weight of body in water= true weight – upthrust
=3.5-1 = 2.5kgf
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