A metal block of area 
is connected to a 0.01 kg mass via a string that passes over a mass less and frictionless pulley as shown in figure. A liquid with a film thickness of 0.3 mm is placed between the block and the table. When released the block moves to the right with a constant speed of 
The coefficient of viscosity of the liquid is (Take 
)
Text Solution
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Here, 
The metal block moves to the right due to tension T of the string which is equal to the weight of the mass suspended at the end of the string.
Thus,
Shear force, 
Shear stress on the fluid 
Strain rate 
Coefficient of viscosity, 
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