A metal plate of area text1 text0 text3 textc textm text2 rests on a layer of oil 6 mm thick. A tangential force of 10-2 textN is applied on it to move it with a constant velocity of 6 textcm texts-1. The coefficient of viscosity of the liquid is :

Question

A metal plate of area text1 text0 text3 textc textm text2 rests on a layer of oil 6 mm thick. A tangential force of 10-2 textN is applied on it to move it with a constant velocity of 6 textcm texts-1. The coefficient of viscosity of the liquid is : (A) 0.1 poise (B) 0.5 poise (C) 0.7 poise (D) 0.9 poise

Tardigrade Admin · Accepted Answer

η =(F/A(dv/dy)) ∴ η =(10-2/(103× 10-4)( (6× 10-2)6× 10-3 ))=(10-2× 6× 10-3/10-1× 6× 10-2) =10-2N-s-m2=0.1 Poise

Q. A metal plate of area $1 0^{3} c m^{2}$ rests on a layer of oil 6 mm thick. A tangential force of $10^{- 2} N$ is applied on it to move it with a constant velocity of $6 cm s^{- 1} .$ The coefficient of viscosity of the liquid is :

0.1 poise

0.5 poise

0.7 poise

0.9 poise

$η = \frac{F}{A ( d v / d y )}$ $∴$ $η = \frac{10 ^{- 2}}{( 10 ^{3} \times 10 ^{- 4} ) ( \frac{6 \times 10 ^{- 2}}{6 \times 10 ^{- 3}} )} = \frac{10 ^{- 2} \times 6 \times 10 ^{- 3}}{10 ^{- 1} \times 6 \times 10 ^{- 2}}$ $= 10^{- 2} N - s - m^{2} = 0.1$ Poise

Q. A metal plate of area 103cm2 rests on a layer of oil 6 mm thick. A tangential force of 10−2N is applied on it to move it with a constant velocity of 6cms−1. The coefficient of viscosity of the liquid is :