Physics
A body weighs 450 gf in air and 310 gf when completely immersed in water.
Find —
(i) the volume of the body,
(ii) the loss in weight of the body, and
(iii) the upthrust on the body.
State the assumption made in part (i).
Answer
(i) Volume of the body = density of water x loss in weight
density of water = 1 g cm-3
Given,
weight in air = 450 kgf
weight in water = 310 kgf
loss in weight = 450 – 310 = 140 gf
Substituting the values in the formula above, we get,
Volume of the body = 1 x 140 = 140 cm3
(ii) Loss in weight = 140 gf
(iii) Upthrust = loss in weight = 140 gf
Assumption in part (i) — density of water = 1.0 g cm-3
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