Rain drop of radius 0.2mm falling with velocity of 2m/s. If coefficient of viscosity of air is 1.8×10−4Ns/m2, determine viscous force acting on the drop.

Viscous force F=6πηrvSo, F=6π×1.8×10−4×0.2×10−3×2⟹ F=1.36×10−6 N

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Rain drop of radius 0.2 mm falling with velocity of 2 m/s. If

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Rain drop of radius $0.2 mm$ falling with velocity of $2 m / s$ . If coefficient of viscosity of air is $1.8 \times 1 0^{- 4} N s / m^{2}$ , determine viscous force acting on the drop.

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Charlotte Discussed

Rain drop of radius

0.2 mm

falling with velocity of

2 m / s

. If coefficient of viscosity of air is

1.8 \times 1 0^{- 4} N s / m^{2}

, determine viscous force acting on the drop.

9 mins ago

Discuss this question LIVE

9 mins ago

Viscous force

F = 6 π ηr v

So,

F = 6 π \times 1.8 \times 1 0^{- 4} \times 0.2 \times 1 0^{- 3} \times 2

⟹ F = 1.36 \times 1 0^{- 6} N

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Question Text	Rain drop of radius $0.2 mm$ falling with velocity of $2 m / s$ . If coefficient of viscosity of air is $1.8 \times 1 0^{- 4} N s / m^{2}$ , determine viscous force acting on the drop.
Answer Type	Text solution:1
Upvotes	151