1: Pin B can support a load up to 8 kN, roller A can support a load up to 4 kN. Calculate the maximum distributed load, w, in kN/m before either the pin or roller exceeds its maximum allowable load. 30° B 3 m - 4 m
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- A lifeboat hangs from two ship's davits. as shown in the figure. A pin of diameter d = 0.80 in. passes through each davit and supports two pulleys. are on each side of the davit. Cables attached to the lifeboat pass over the pulleys and wind around winches that raise and lower the lifeboat. The lower parts of the cables are vertical and the upper parts make an angle a =15° with the horizontal. The allowable tensile force in each cable is 1800 lb, and the allowable shear stress in the pins is 4000 psi. If the lifeboat weighs 1500 lb, what is the maximum weight that can be carried in the lifeboat?Two steel wines support a moveable overhead camera weighing W = 28 lb (see figure part a) used For close-up to viewing of field action at sporting, events. At some instant, wire I is at an angle a = 22° to the horizontal and wire 2 is at angle fi = 40°. Wires I and 2 have diameters of 30and 35 mils, respectively. (Wire diameters are often expressed in mils; one mil equals 0.001 in.) (a) Determine the tensile stresses s and s2 in the two wires. (b) If the stresses in wires 1 and 2 must be the same, what is the required diameter of wire 1 ? (c) To stabilize the camera for windy outdoor conditions, a third wire is added (see figure part b). Assume the three wires meet at a common point coordinates (0, 0. 0) above the camera at the instant shown in figure part b. Wire I is attached to a support at coordinates (75 ft, 48 ft, 70 Ft). Wire 2 is supported at (-70 ft. 55 ft, 80 Ft). Wire 3 is supported at (-10 ft. -85 Ft, 75 ft). Assume that all three wires have a diameter of 30 mils. Find the tensile stresses in all three wiresAn inflatable structure used by a traveling circus has the shape of a half-circular cylinder with closed ends (see figure). The fabric and plastic structure is inflated by a small blower and has a radius of 40 ft when fully inflated. A longitudinal scam runs the entire length of the "ridge" of the structure. If the longitudinal scam along the ridge tears open when it is subjected to a tensile load of 540 pounds per inch of seam, what is the factor of safety n against tearing when the internal pressure is 0,5 psi and the structure is fully inflated?
- Repeat Problem 11.2-14 using L = 12 ft, ß = 0.25 kips/in., ßRl= 1.5ßL2, and ßR2= 2 ßR1.An idealized column is composed of rigid bars ABC and CD joined by an elastic connection with rotational stiffness ßRIat C. There is a roller support at B and an elastic support at D with translationa1 spring stiffness ß and rotational stiffness ßR2. Find the critical buckling loads for each of the two buckling modes of the column. Assume that L = 3 m, ß = 9 kN/m, and ßR]= ßR1= ßL2. Sketch the buckled mode shapes.The 1.5 kN vertical OA pole is supported as shown in the figure and loaded with a horizontal force of 20 kN. Its support is the ball joint. appear in each cablefind the tensile force
- A vertical load of (1.5C) kN is applied on a cantilever truss as shown in Figure 2. The truss is attached to the vertical wall and supported by bearing at A and B. For system stability, the bearing at A and B exerts forces Av, Ah, and Bh. If forces Av and (1.5C) kN make a counter clockwise couple and forces Bh and Ah make a clockwise couple, Solve for the magnitude of supporting forces. Note C= 4740Write legibly, provide manual step by step solution, and diagram for below given problem. Compute the allowable load in KN on a 40mm x 140cm long steel rod with a maximum elongation must not exceed 5mm. Modulus of elasticity for steel is 206. 7857 GPa. (Ans. F = 9280.52KN)1-32 A control pedal for actuating a spring mechanism is shown in the figure. Calculate the shear stress in pins A and B due to force P when it causes a stress of 75 MPa in rod AB. Both pins are in double shear. Diameter of the Pin attached in the photo of the table provided below.
- The figures below show a formed sheet-steel bracket. The total distributed load “W” on the bracket is 20 kN. It is secured to the support with two grade 5.8 bolts. The joint constant is C=0.183, and the bolts are preloaded to 70 percent of the proof load. The dimensions of the top flange are the same as the mounting flange.a) Find the external loads (P1 and P2) carried by upper and bottom bolts respectively if both resist the moment?b) Find the upper bolt diameter by ignoring direct shear load and determine/select a standard metric bolt size with a pitch for a design factor of 1,4.c) Is there any need to enlarge 5 mm dia. holes in the bracket?A load of F = 14 kN is applied to a circular chain link shaped on the right. em = 600 N / mm2What is the diameter of the chain link in order to carry the given load safely?9-8kN stress/force on the AB rope holding the base station shown below There are. In order for the net force at point A of this base station to be downward What is the stress/force that should be on the AC rope? A) 5556 N C) 7356 N B) 8200 N D) 3648 N E) 1228 N