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MHT CET 2025 Physics question

PhysicsMechanical Properties of FluidsMHT CET 2025

'n' small water drops of same size (radius r) fall through air with constant velocity V. They coalesce to form a big drop of radius R. The terminal velocity of the big drop is

Answer: (A)

Solution

Terminal velocity of a sphere in a viscous medium is . So for the small drop and for the big drop , giving $=⇒

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Question ID VK-100543