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A metal plate of {10^{3;}}c{m^2} rests on a layer of oil 6 mm

Question

A metal plate of $1 0^{3} c m^{2}$ rests on a layer of oil 6 mm thick.A tangential force $1 0^{- 2}$ N is applied on it is on it to move it with a constant velocity of 6 $c m s^{- 1} .$ What is the coefficient of viscosity of the liquid?

0.1 poise

0.2 poise

0.3 poise

0.4 poise

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Emma Discussed

A metal plate of

1 0^{3} c m^{2}

rests on a layer of oil 6 mm thick.A tangential force

1 0^{- 2}

N is applied on it is on it to move it with a constant velocity of 6

c m s^{- 1} .

What is the coefficient of viscosity of the liquid?

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Text solutionVerified

We know that

η = \frac{fd l}{A d v}

Given f = 1 0^{- 2} N d v = 6 cm s^{- 1}

d l = 6 mm = 0.6 cm

A = 1 0^{3} cm^{2}

so

n = \frac{1 0 ^{- 2} \times 0.6}{1 0 ^{3} \times 6}

= 0.1 \times 1 0^{- 5}

= 0.1 poise

Answer: (A)

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Question Text	A metal plate of $1 0^{3} c m^{2}$ rests on a layer of oil 6 mm thick.A tangential force $1 0^{- 2}$ N is applied on it is on it to move it with a constant velocity of 6 $c m s^{- 1} .$ What is the coefficient of viscosity of the liquid?
Answer Type	Text solution:1
Upvotes	150