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Standard IX

Physics

Consequences of Atmospheric Pressure

A non-viscous...

Question

A non-viscous fluid of constant density of1000 $k g / m^{3}$ flows in a stream line motion alonga tube of variable cross-section. The area of cross-section at two P andQ at lengths $5 m$ are $40 {c m}^{2}$ and 20 ${c m}^{2}$ respectively. If veloc-ity of fluid at $P$ is 3 $m / s$ then find velocity of fluidat $Q$

3 m / s

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4 m / s

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5 m / s

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6 m / s

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Solution

The correct option is D $6 m / s$
Acc. to continuity theorem
$A_{1} v_{1} = A_{2} v_{2}$
$40 \times 3 = 20 \times v_{L}$
$v_{L} = 6 m / s$
Answer:(D) $6 m / s$

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A non-viscous fluid of constant density of1000kg/m3 flows in a stream line motion alonga tube of variable cross-section. The area of cross-section at two P andQ at lengths5m are 40cm2 and 20cm2 respectively. If veloc-ity of fluid at P is 3m/s then find velocity of fluidat Q

The correct option is D 6m/sAcc. to continuity theoremA1v1=A2v240×3=20×vLvL=6 m/sAnswer:(D) 6 m/s

The correct option is D $6 m / s$
Acc. to continuity theorem
$A_{1} v_{1} = A_{2} v_{2}$
$40 \times 3 = 20 \times v_{L}$
$v_{L} = 6 m / s$
Answer:(D) $6 m / s$