$\"\"$

\

Observe the diagram :

\

The depth is $\"\"$ .

\

The length is $\"\"$ .

\

Draw the diagram :

\

$\"\"$

\

Length of the strip is $\"\"$ .

\

The weight density of water is $\"\"$ .

\

The limits range from $\"\"$ to $\"\"$ .

\

$\"\"$

\

The fluid force using the formula : $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Therefore, the fluid force is $\"\"$ .

\

$\"\"$

\

The fluid force is $\"\"$ .