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Mechanical Properties of Fluids — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsMechanical Properties of Fluids1 Mark
Question
The diameter of ball A is twice of that of B. What will be the ratio of their terminal velocities in water?
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Answer

As terminal velocity $\propto$ $(radius ~of ~ball)^2$ therefore, ratio of terminal velocities of A and B will be 4 : 1.

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