A cylinder of radius r and length I rotates with angular velocity w with in guides of radius r+h, where h is the gap between the cylinder and the guide. What is the shear stress acting on cylinder wall if the gap is filled with oil of viscosity u? Select one of the following correct answers.

The term fluid represents a type of substance that can easily change its shape under any external pressure/force and can flow. Fluids can acquire any shape in which it is stored and can resist normal stresses but cannot resist shear stress in rest condit…