The door to an airplane hangar consists of twouniform sections, which are hinged at the middle as shownin Fig.is attached to a bar along the bottom edge of the door.Smooth rollers at the ends of the bar C run in a smooth ver-tical channel. If the door is 30 ft wide, 15 ft tall, and weighs1620 lb,. The door is raised by means of a cable, whichPlot P, the force required to hold the door open, as afunction of the door opening height h (0.5 shs14.5 ft).7.5 ftB7.5 ft

Answered: The door to an airplane hangar consists…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A dam with triangular cross section holds back a body of water. The dam has height h. The dam is made of concrete, which has speci…c gravity 3.1. What is the maximum angle, , for which thedam will not tip over about point O?
A 6-m-high, 5-m-wide rectangular plate blocks the end of a 5-m-deep freshwater channel, as shown in Fig. below. The plate is hinged about a horizontal axis along its upper edge through a point A and is restrained from opening by a fixed ridge at point B. Determine the force exerted on the plate by the ridge.
Figure AB Cover rests on a flat surface. Cover 180 kg weight and 1.2 m wide. At what height is the water depth the lid won't open? find it. (glycerin density is 1260 kg/m3 , That density 1000 kg/m3 )
A rectangular gate 5 m × 3 m is hinged at its base A and inclined at 60 degree to the horizontal as shown in the figure. To keep the gate in a stable position a counter weight (W) of 5000 kg is attached at the upper end of the gate. Find the depth of water at which the gate begins to fall. The weight of the gate is 2000 kg. Neglect the friction at the hinge and pulley
The strength per meter of the longitudinal joint in the figure is 480 kN, whereas or the girth joint is 200 kN. Determine the maximum diameter of the cylindrical tank if the internal pressure is 1.5 MPa.
Gate AB in the Figure is 6 ft wide into the paper, hinged at A, and restrained by a stop at B. Compute the force on stop B, if the water depth h = 11 ft.
Gate AB in the figure below is a 5-ft wide, vertical, rectangular gate, hinged at A and restrained by a stop at B. The water depth, h = 9.5 ft. Determine: a) the hydrostatic force acting on the gate and the location of the center of pressure b) The vertical and horizontal reactions at the hinge at A.
A 4-m-high, 5-m-wide rectangular plate blocks the end of a 4-m-deep freshwater channel, as shown inthe Figure 2 below. The plate is hinged about a horizontal axis along its upper edge through a point Aand is restrained from opening by a fixed ridge at point B. Determine the force exerted on the plate bythe ridge. Clearly state all asuumptions and illustrations.
In the Figure below, the cover gate AB closesa circular opening 80 cm in diameter. The gate is held closed by a 200-kg mass as shown. Assume standard gravity at 20 °C. At what water level (h) will the gate be dislodged? Neglect the weight of the gate. Specific weight of water 9790 N/m3
A vertical cylinder gasoline storage tank is 30m in diameter and is filled to a depth of 15m with gasoline of mass density 740 kg/m³. if the shell plating has an allowable stress of 100 MPa, calculate the required wall thickness at the bottom of the tank.
A hollow, pressurized sphere having a radiusr = 4.8 in. and wall thickness t = 0.4 in. is loweredinto a lake (see figure). The compressed air in thetank is at a pressure of 24 psi (gage pressure whenthe tank is out of the water).At what depth D0 will the wall of the tank besubjected to a compressive stress of 90 psi?
In Fig., gate AB is 5 ft wide into the paper, and stopB will break if the water force on it equals 9200 lbf. Forwhat water depth h is this condition reached?

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