problem #$3.$

the gate has a width through the page of $1ft.$ The fluid is water.

$($a$)$ The resultant force on gate $AB,$ in $lb,$ is

$[4]$

$($b$)$ The vertical location from the surface, in $ft,$ of the resultant force on gate $AB$

is

$2]$

$($c$)$ The normal or vertical reaction, in $lb,$ at the smooth support $A$ is