The velocity of a small ball of mass M and density d , when dropped in a container filled with glycerine becomes constant after some time. If the dens - Physics MCQ NEET 2021 2026 | ExamTest.live

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The velocity of a small ball of mass M and density d, when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is d /2, then the viscous force acting on the ball will be:

Solution & Step-by-step Explanation

When the velocity is constant, the net force is zero. F_{v i sco u s} + F_{b u oy an t} = W_{w e i g h t} F_{v} = W - F_{b} Weight W = M g = V d g Buoyant Force F_{b} = Vσ g = V (d /2) g = \frac{1}{2} V d g = \frac{1}{2} M g $ F_{v} = M g - \frac{1}{2} M g = \frac{1}{2} M g $

Try it yourself before checking the explanation above.

The velocity of a small ball of mass M and density d, when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is d /2, then the viscous force acting on the ball will be:

\frac{3}{2} M g

2 M g

\frac{1}{2} M g

M g

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