Water flows out of a big tank along a tube bent at right angles, the inside radius of the tube is equal to `r=0.50cm` (figure). The length of the horizontal section of the tube is equal to `l=22cm`. The water flow rate is `Q=0.50` litres per second. Find the moment of reaction forces of flowing water, acting on the tube's walls, relative to the point O.

Options

A. `(rhoQ^(2)l)/(pir^(2))`
B. `(rhoQ^(2)l)/(pir)`
C. `-(rhoQ^(2)l)/(pir^(2))`
D. `(rhoQl)/(pir^(2))`

Answer

A