The bell crank, which is in equilibrium under the forces shown in the figure, is supported by a 15-mm-diameter pin at Dhat is in double shear. If F = 20 kN: 200 mm 240 1.) Determine the value of Pin kN a. 21.82 b. 27.02 c. 23.90 d. 20.78 2.) Determine the reaction at point D in kN. a. 44.15 b. 30.25 c. 38.85 d. 35.32 3.) Determine the required diameter of the connecting rad AB in mm, given that its tensile working stress is 90 MPa a. 16.46 b. 18.01 c. 18.36 d. 17.15 4.) Determine the shear stress in the pin in MPa. a. 99.94 b. 63.74 c. 85.89

A Beam is supported by a pin A and cable Bc ar b. The horizontal component of four reaction at pin A is ?

The lid of a roof scuttle weighs 93-lb. It is hinged at corners A and B and maintained in the desired position by a rod CD pivoted at C, a pin at end of D of the rod fits into one of several holes drilled in the edge of the lid. Assume that the hinge at B does not exert any axial thrust. The value of a = 50°. y 26 in. D 15 in 7 in. 32 in. For the position shown, determine the magnitude of force exerted by rod CD. (You must provide an answer before moving to the next part.) The magnitude of force exerted by rod CD is lb.

vi)  Using Macauley’s method, determine the deflection of the member at the locations where the 25 kN, 20 kN and 50 kN point loads are applied. Comment on how the maximum deflection of the member could be determined. Material properties for steel: Maximum allowable tensile stress = 750 MN/m2 Maximum allowable torsional shear stress = 375 MN/m2 Young’s Modulus of elasticity = 205 GN/m2Modulus of rigidity = 81 GN/m2Poisson’s ratio = 0