MHT CET (PCB) 2025 9th April Evening Shift | Fluid Mechanics Question 2 | Physics

Two solid spheres of same material but of mass ' M ' and ' 8 M ' fall simultaneously through a viscous liquid. Their terminal velocities are respectively ' V ' and ' nV '. The value ' n ' is

MHT CET (PCB) 2025 9th April Evening Shift

MCQ (Single Correct Answer)

-0

A small steel ball of mass ' M ', radius ' R ' and density ' $\rho$ ' falls with terminal velocity through a tube filled with glycerine of density ' $\sigma$ '. The viscous force acting on the steel ball is ( $\mathrm{g}=$ acceleration due to gravity)

$\mathrm{Mg} \frac{\rho}{\sigma}$

$\mathrm{Mg}(\mathrm{Q}-\sigma)$

$\mathrm{Mg} \rho \sigma$

$M g\left(1-\frac{\sigma}{\rho}\right)$

MHT CET (PCB) 2025 9th April Morning Shift

MCQ (Single Correct Answer)

-0

If the shape of the liquid surface is curved, then the

pressure on the convex side is equal to the atmospheric pressure.

pressure on the convex side is equal to the pressure on the concave side.

pressure on the concave side is greater than that on the convex side.

pressure on the concave side is lesser than that on the convex side.

MHT CET (PCB) 2025 9th April Morning Shift

MCQ (Single Correct Answer)

-0

A spherical liquid drop of radius R is divided into 64 equal droplets. If surface tension is $T$ then the work done in this process will be

$8 \pi R^2 T$

$\quad 12 \pi R^2 T$

$4 \pi R^2 T$

$\quad 16 \pi R^2 T$

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