The vertical pipe coming out of the bottom of the vessel with liquid is hermetically fitted with a curved nozzle — Segner wheel. If liquid is added to the vessel so that the level of liquid in it does not change when it flows out, the Segner wheel rotates at a constant angular velocity ω. Determine the moment of friction forces acting on the nozzle if the liquid flows out of it at a velocity u tangent to a circle of radius R. Liquid mass flow rate per unit time µ.