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Standard VII

Physics

Why Objects Float or Sink

A body of mas...

Question

A body of mass $2.0 kg$ and density $8000 {kg/m}^{3}$ is completely immersed in a liquid of density $800 {kg/m}^{3}$ . Find the force of buoyancy on it.

$(g = 10 {m/s}^{2})$

2 N

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3 N

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4 N

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5 N

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Solution

The correct option is A $2 N$
We know that, force of buoyancy,

$F = ρ g V$

$\Rightarrow F = ρ g \times \frac{m}{σ}$

$\Rightarrow F = 800 \times 10 \times \frac{2}{8000} = 2 N$

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A body of mass 2.0 kg and density 8000 kg/m3 is completely immersed in a liquid of density 800 kg/m3. Find the force of buoyancy on it. (g=10 m/s2)

The correct option is A 2 NWe know that, force of buoyancy, F=ρgV ⇒F=ρg×mσ ⇒F=800×10×28000=2 N

A body of mass $2.0 kg$ and density $8000 {kg/m}^{3}$ is completely immersed in a liquid of density $800 {kg/m}^{3}$ . Find the force of buoyancy on it.

$(g = 10 {m/s}^{2})$

The correct option is A $2 N$
We know that, force of buoyancy,

$F = ρ g V$

$\Rightarrow F = ρ g \times \frac{m}{σ}$

$\Rightarrow F = 800 \times 10 \times \frac{2}{8000} = 2 N$