Problem #$3$:

An isosceles triangle gate in a wall is hinged at location A$.$ Determine the magnitude of force $F_H$ just

required to hold the gate closed at location B$.$ Assume a specific weight of $9810\frac{N}{m^3}$ for water.

Known are the following:

$S{G}_y=0\mathrm{.}9$

$x_1=1\mathrm{.}2m$

$x_2=2m$

$x_3=2\mathrm{.}5m$

$=60$