$2\mathrm{.}2$ Figure $2$ below shows a sluice gate in the form of a circular arc.

$2\mathrm{.}2\mathrm{.}1$ Calculate the resultant thrust on the sluice gate per metre length due to the water.

$2\mathrm{.}2\mathrm{.}2$ Calculate the inclination of the resultant thrust with reference to the horizontal.

Figure $2$

$($NOT to scale$)$