A raindrop of radius 0.3 mm has a terminal velocity in air = 1 m s - 1 . The viscous force on it is (Given the viscosity of the air is 18 × 10 - 5 g cm - 1 s - 1 )

Question

A raindrop of radius 0.3 mm has a terminal velocity in air = 1 m s - 1 . The viscous force on it is (Given the viscosity of the air is 18 × 10 - 5 g cm - 1 s - 1 ), 101.73 × 10 - 4 d y n e, 101.73 × 10 - 5 d y n e, 16.95 × 10 - 4 d y n e, 16.95 × 10 - 5 d y n e

MARKS App · Accepted Answer

F = 6 π η r v = 6 × 3.14 × ( 18 × 10 - 5 ) × 0.03 × 100 = 101.73 × 10 - 4 d y n e

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