What is the vertical reaction component at A for the frame shown? 3 k/ft 45.0 k Select the correct response: 24.9 k 50.1 k -20 ft- 30.0 k D -21 E = constant E B-15 k 10 ft 5 ft
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- Solve Sample Prob. 4.5, assuming that the spring is unstretched when 0 = 90°.(Reference to Sample Problem 4.5):Calculate the maximum force P that can be applied in a phosphor bronze spring having mean diameter of 150 mm and consisting of 24 turns of 10-mm diameter wire when the spring is stretched 180mm. Use G = 42 GPa. Group of answer choices 233.11 N 113.33 N 116.667 N 225.56 NA helical compression spring is required to provide a minimum force of 150 lb at installation and have a working deflection of 1 in. The spring rate is 75 lb/in. The coil must fit in a 2.1-in-dia hole with 0.1 in total clearance. Use 0.25-in diameter unpeened music wire and squared/ground ends. Use a 15% clash allowance, shear modulus G = 11.5 Mpsi, and weight density γ = 0.285 lb/in3. Assume Sys = 0.6Sut. Part A Find the shear stress at the initial deflection. Express your answer in pounds per square inch to three significant figures. τiτi = Part B Find the mean stress. Express your answer in pounds per square inch to three significant figures. Part C Find the alternating stress in the coil. Express your answer in pounds per square inch to three significant figures. Part D Find the fatigue safety factor for infinite life in shear. Express your answer using three significant figures.…
- A spring balance is calibrated in an environment at a temperature of 25oC and has the following deflection/load characteristics Load (Kg) 0 2 Deflection(mm) 0 36 It is used in an environment at a temperature of 35oC and the following deflection/ load characteristics. Load (Kg) 0 2 Deflection(mm) 4 50 Determine ZERO DRIFT at 25oC ? ZERO DRIFT at 35oC ? ZERO DRIFT? ZERO DRIFT/oC?An 18 coils helical spring having a load of 100kg. The modulus of elasticity in shear of spring is 96.62 GPa, OD of 9.256 cm and with wire diameter of 9.525 mm. The spring is squared and ground ends. Compute for the following respectively: 1) number of effective coils2) spring index3) axial load (N) 4) deflection (mm) Answers must be at least in 4 decimal places.(13) A spring has an overall length of 44.0in & sustains a load of 15,000lb @ its center. The spring has three full-length leaves & 15 graduated leaves with a central band 4.0in wide. All leaves are to be stressed to 60,000psi when fully loaded. The ratio of total spring depth to width is to be approximately 2.0. Determine: (a) the width & thick ness of the leaves; (b) the initial space that must be provided between the full length & the graduated leaves before the band is applied; (c) What load is exerted on the band after the spring is assembled?
- Note: Express your answer in terms of the units. Observe 3 decimal places. The error threshold is ± 2.50% Relative to the right answer. 1.) The reaction @ point D 2.) The tension @ Cable BE. 3.) The x-component of the reaction @ A. 4.) The y-component of the reaction @A 5.) The reaction @ A.A hand cranking lever, as shown in Figure 6 below, is used to start a truck engine byapplying a force F = 400 N. The material of the cranking lever has a yield strength = 320 MPa;Ultimate tensile strength = 500 MPa; Young’s modulus = 205 GPa; Modulus of rigidity = 84 GPaand poisson’s ratio = 0.3. Assuming factor of safety to be 4 based on yield strength, design thediameter of the lever at section X-X near the guide bush using: a) Maximum distortion energytheory; and b) Maximum shear stress theory.A 68 kg mass is supported by the three springs as shown. The initial displacement is 15 cm downward from the static equilibrium position. No external forces act on the mass after it is released. The equivalent spring constant is 5600 N/m. What is the static deflection of the mass? [Don't copy from other site]
- If spring is found to extend 20mm for each 2kg of mass, the defelaction of spring carrying a mass of 10kg is A)200mm B)1m C)0.1m D)10mDetermine the minimum force required to deflect the spring with spring constant of 251 N/mm to a displacement of 5 mm.A mechanism used in printing machinery consists of a tension spring assembled with a preload of 40 N. The mean diameter of the coilis 32 mm with a spring index of 8. The spring has 18 active coils. The spring wire is hard drawn and oil tempered having the following material properties: a.Design shear stress = 700 MPb b. .Modulus of rigidity = 80 kN/mm2 Identify (a) the initial torsional shear stress in the wire, (b) the spring rate, and (c) the force to cause the body of the spring to reach its yield strength.