The water jet exiting from a stationary tank through a circular opening of diameter $300 \: mm$ impinges on a rigid wall as shown in the figure. Neglect all minor losses and assume the water level in the tank to remain constant. The net horizontal force experienced by the wall is ___________ $kN$.
Density of water is $1000 \: kg/m^3$.
Acceleration due to gravity $g=10 \: m/s^2$.