Figure $5$ : A Tank

$(10$ Marks$)$

$6.$ A curve surface is shown in Figure $6$ restraining a body of static fluid. Compute the magnitude of the horizontal component and vertical component of the force exerted by the fluid on the surface. Then, compute the magnitude of the resultant force and its direction. Show the resultant force acting on the curved surface. The surface is $4$ m long.

Figure $6$ : A Tank with a Curve Surface

$(10$ Marks$)$

$0\mathrm{.}45$ m

$7.$ A cylindrical $log$ has a diameter of $450$ mm and a length of $6\mathrm{.}75$ m $.$ When the $log$ is floating in fresh water with its long axis horizontal. $110$ mm of its diameter is above the surface. Compute the specific weight of the wood in the log$.$

$(10$ Marks$)$