Properties Of Solids And Liquids Question 219
Question: A square plate of 0.1 m side moves parallel to a second plate with a velocity of 0.1 m/s, both plates being immersed in water. If the viscous force is 0.002 N and the coefficient of viscosity is 0.01 poise, distance between the plates in m is [EAMCET(Med.) 2003]
Options:
A)0.1
B)0.05
C)0.005
D)0.0005
Show Answer
Answer:
Correct Answer: D
Solution:
$ A={{(0.1)}^{2}}=0.01m^{2} $ ,$ \eta =0.01\ Poise=0.001\ \ decapoise $ (M.K.S. unit),dv = 0.1 m/s and F = 0.002 N
$ F=\eta A\frac{dv}{dx} $
$ \therefore \ \ dx=\frac{\eta Adv}{F}=\frac{0.001\times 0.01\times 0.1}{0.002}=0.0005m $ .
