Q1: In Figure below, find the seawater hydrostatic force F acting on the trapezoidal gate and locate the corresponding centre of pressure h Assume a = 80 cm, b= 120 cm. Gate 2.5 Sea water S- 1.025 60

2. Figure 2 shows the rectangular gate AB with the width of the gate is 2.5 m. Find the resultant force and its centre of pressure vertically from the water surface to gate AB. 17 m water Figure 2 B 9.6 m 7.2 m

A rectangular gate of width "a", length "b" and inclined at an angle "A", with water on one side is shown in the figure. Use a=9.5 ft, b=5ft, z=6.5ft and angle A=55 degrees. (a) Determine the location of the center of the gate from the water surface along the plane of the gate (in feet). (b) Determine the eccentricity (in feet). (c) Determine the location of the center of pressure from the water surface along the plane of the gate (in feet). (d) Determine the vertical distance (in feet) of the center of the gate from the water surface. (e) Determine the total resultant force (in lb) acting on the side of the gate.