A silver ingot weighing 2.1 kg is held by a string so as to be completely imme

Discussion Forum : Mechanical Properties Of Fluids

Question -

A silver ingot weighing 2.1 kg is held by a string so as to be completely immersed in a liquid of relative density 0.8. The relative density of silver is 10.5. The tension in the string in kg-wt is

Options:

A . 1.6

B . 1.94

C . 3.1

D . 5.25

Answer: Option B
:
B

Apparent weight = $V (ρ - σ) g = \frac{M}{ρ} (ρ - σ) g$

$= M ⟮ 1 - \frac{σ}{ρ} ⟯ g = 2.1 ⟮ 1 - \frac{0.8}{10.5} ⟯ g = 1.94 g N$

$= 1.94 K g - w t$

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