2. A lock is a device used for raising and lowering boats, ships and other watercraft between stretches of water of different levels on river and canal waterways. Below is simplified model of a lock gate. A channel of 10 m deep and 34 m wide is enclosed by two gates A and B, which are hinged at the banks. If the gates are fully close and only the upstream side has water, determine the force exerted on the hinge of Gate A and its direction

A trapezoidal channel with the cross section shown in the figure has a gate at one end. How much is the minimum P force needed to keep the vertical gate closed, if it is articulated at its lower end? The gate has the same dimensions as the channel and the force P acts at the same height as the surface of the water.

A sector-shaped sluice gate having a radius of curvature of 5.4 m is as shown. The center of curvature C is 0.9m vertically below the lower edge A of the gate about which the gate is constructed to turn. If the water level is 2.4m above the lower edge of the gate, determine the magnitude of the total force (in kN) acting on the gate using the General Solution.

A rectangular pontoon 10 m long, 5.9 m wide and 3 m deep has a draft of 2 m in water. If the barge tilts through an angle of 4 degrees, what is the value of the righting moment?