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Physics - Fluid Question with Solution | TestHub

PhysicsFluidViscosityEasy2 minPYQ_2021

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The velocity of a small ball of mass $M$ and density $ρ$ , when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is $\frac{ρ}{2}$ , then the viscous force acting on the ball will be:NEET 2021

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Answer:

Solution:

When velocity becomes constant then,

$F_{v} + F_{b} = M g$

$F_{v} = M g - F_{b}$

$= V ρ_{b} g - V ρ_{g} g$

$= V g [ρ - \frac{ρ}{2}]$

$= \frac{V g ρ}{2}$

$= \frac{(V ρ) g}{2} = \frac{M g}{2}$

Stream:NEETSubject:PhysicsTopic:FluidSubtopic:Viscosity

⏱ 2mℹ️ Source: PYQ_2021

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