T $ R Fixed outer 3. Consider a cup of cylindrical cross section cylinder Liquid filled with a viscous liquid and a suspended bob [see the Figures). The cylindrical bob is then made to rotate with a constant angular velocity and torque. Rotating Such systems are used to measure liquid viscosity. cylinder Assume steady, tangential, laminar, ID flow with constant properties in the annular region between the two coaxial cylinders with negligible pressure and gravitational effect. Derive an expression of the linear tangential velocity as a function of r by solving the governing equation of motion with appropriate boundary conditions. 7 Marks . inner