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Physics - Fluid Question with Solution | TestHub

PhysicsFluidViscosityMedium2 minPYQ_2021

PhysicsMediumsingle choice

The velocity of a small ball of mass ' $M$ ' and density ' $d_{1}$ ' when dropped in a container filled with glycerin becomes constant after some time. If the density of glycerin is ' $d_{2}$ ', the viscous force acting on the ball is ( $g$ = acceleration due to gravity)

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Answer:

Solution:

Since the velocity is constant, the net force acting on the ball is zero. $F_{V} + F_{B} = Mg F_{V} + Vd_{2} g = Mg$ $F_{v} + \frac{M}{d _{1}} d_{2} g = Mg$ $F_{V} = Mg (1 - \frac{d _{2}}{d _{1}})$

Stream:MHT_CETSubject:PhysicsTopic:FluidSubtopic:Viscosity

⏱ 2mℹ️ Source: PYQ_2021

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