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General
Easy

Question

A cubical block of side ‘a’ and density ‘rho’ slides over a fixed inclined plane with constant velocity ‘v’. There is a thin film of viscous fluid of thickness ‘t’ between the plane and the block. Then the coefficient of viscosity of the thin film will be:

  1. fraction numerator 3 rho g g t over denominator 5 v end fraction    
  2. fraction numerator 4 rho g g t over denominator 5 v end fraction    
  3. fraction numerator rho g g t over denominator v end fraction    
  4. none of these    

The correct answer is: fraction numerator 3 rho g g t over denominator 5 v end fraction

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