Question

A body weighs $500gf$ in air and $450gf$ when wholly immersed in water. Calculate
(i) the loss in weight of the body in water.
(ii) the upthrust of the body.
(iii) volume of the body.

Answer 1

Weight of the body in air $=500gf$
Weight of the body in water $=450gf$
$\therefore$ (i) loss of weight of the body when immersed in water $=500gf-450gf=50gf$.
(ii) upthrust of the body=loss in weight of the body $=50gf$.
(iii) upthrust $=Vdg$
$\Rightarrow 50gf\times g=V\times 1gc{m}^{-3}\times g(densityofwater=1gc{m}^{-3})$
$\Rightarrow volumeofthebodyV=50c{m}^3$.