11-18E The flow of water from a reservoir is controlled by a 5-ft-wide L-shaped gate hinged at point A, as shown in Fig. P11-18E. If it is desired that the gate open when the water height is 12 ft, determine the mass of the required weight W. Answer: 30,900 lbm 8ft- W B Gate 15 ft 12 ft FIGURE P11-18E 11-19E Repeat Prob. 11-18E for a water height of 8 ft.

is 10 m. Each gate is supported by two hinges located at I m and 5 m above the bottom of the lock. The gate, and (i) magnitude of the hinge reactions. [Ans. () 79.279 kN, (i) R7=27.924 kN, R-S1.3AN depth of water on the upstream and downstream sides of the lock are 6 m and 4 m respectively. Find: gates are closed, they make an angle of 120°. The width of the lock is 4 m. If the depths of water on the ne sides of the gates are 4 m and 3 m respectively, determine : () the magnitude of resultant pressure on ca () Resultant water force on cach gate. 24. The end gates ABC of a lock are 8 m high and when closed make an angle of 120°. The width of kat 19. Fig. 3.58 shows a gate having a quadrant shape of radius of 3 m. Find the resultant force due to wa metre length of the gate. Find also the angle at which the total force will act. [Ans. 82.201 kN, 0 = 57 3n 20. A roller gate is shown in Fig. 3.59. It is cylindrical form of 6.0 m diameter. It is placed on the dam the magnitude and direction…

The Curves face of el dam, reteining weter, is shaped accordinge to the elationship 2=206 as shown. The dam has a borizon e62 ontal length H0=3m and the height of water reteined the dam is 20=7-3.1The fluid is water. Yweter=9800 N/m and cetmosphenc pressure may be omitted-com pute the resultant force on the dam and its line of action. The width of the dam s 15.3m. The centroid of the Shaded area (Figure Zii) is 不 weiter 2=2 figure 2ii figure 2i

To get up on the roof, a person (mass 85.0 kg) places a 6.20 m aluminum ladder (mass 15.0 kg) against the house on a concrete pad with the base of the ladder 2.00 m from the house. The top of the ladder rests against a plastic rain gutter, which we can assume to be frictionless. The center of mass of the ladder is 2.00 m from the base, as measured along the ladder. The person is standing on the ladder 3.00 m from the base, as measured along the ladder. Find the normal reaction and friction forces (in N) on the ladder at its base. (Enter the magnitudes.)

A 4-m-long quarter-circular gate of radius 3 m and of negligible weight is hinged about its upper edge A, as shown. The gate controls the flow of water over the ledge at B, where the gate is pressed by a spring. Determine the minimum spring force required to keep the gate closed when the water level rises to A at the upper edge of the gate.

A freshwater marsh is drained to the ocean through an auto- matic tide gate that is 4 ft wide and 3 ft higlı. The gate is held by hinges located along its top cdge at A and bears on a sill at B. If the water level in the marsh is h = 6 ft, determine the ocean level d for which the gate will open. (Specific weight of salt water = 64 IL.) Marsh A h- 6 ft 3 t

The specific weight of water for this problem is 9.81KN/m3. The uniform 7-m-long round wooden rod is tied to the bottom by a string. Th diameter of the rod is 10 cm. Determine: 1 m Water at 20°C String the tension in the string in Newtons. the specific gravity of the wood.

The gage pressure of air in a pressurized water tank is measured simultaneously by both a pressuregage and a manometer. The differential height h of the mercury column is to be determined. Assumptions The air pressure in the tank is uniform (i.e., its variation with elevation is negligible dueto its low density), and thus the pressure at the air-water interface is the same as the indicated gagepressure.

Please solve fast and correct

The flow of water from a container is controlled by a 5-ft-wide L-shaped gate hinged at point A, as shown in the figure. If it is desired that the gate open when the height of the water is 10 ft, determine the weight W of the counterweight to achieve this. Take d= 5 ft and H = 16 ft. Give your answer in lb and without decimals.