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Taidhg

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## Homework Statement

A vertical retaining gate 2metres X 24metres hinged about the bottom edge of a dry dock has water to a depth of 21 metres on one side. Calculate the Retaining Force at the middle of the free upper edge of the gate to keep it shut in the vertical position. With the density of seawater being 1030Kg/m

^{3}.

## Homework Equations

Hydrostatic pressure = D*g*h

Force = P*A

Thrust force = D*g*(h/2)*A

Overturning moment = Thrustforce*(h/3)

## The Attempt at a Solution

I am sorry I really don't understand this question.