A flat plate of area 0.1 ,m^2 is placed on a | vedclass

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(B) According to Newton's law of viscosity,the viscous force $F$ is given by the formula: $F = \eta A \frac{dv}{dx}$.Here,$\eta = 1.5 \,N \cdot s \cdo

Vedclass · Accepted Answer

$15$

Vedclass · Answer

(B) According to Newton's law of viscosity,the viscous force $F$ is given by the formula: $F = \eta A \frac{dv}{dx}$.Here,$\eta = 1.5 \,N \cdot s \cdot m^{-2}$ is the coefficient of viscosity,$A = 0.1 \,m^2$ is the area of the plate,$v = 1 \,mm \cdot s^{-1} = 10^{-3} \,m \cdot s^{-1}$ is the velocity,and $dx = 10^{-5} \,m$ is the thickness of the oil film.Substituting these values into the formula:$F = 1.5 	imes 0.1 	imes \frac{10^{-3}}{10^{-5}}$$F = 0.15 	imes 10^2$$F = 0.15 	imes 100 = 15 \,N$.Therefore,the force required is $15 \,N$.

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