Help me please is for today _II_ A pickup truck tailgate supports a crate (WC = 150 lb), as shown in the figure. The tailgate weighs WT = 60 lb and is supported by two cables (only one is shown in the figure). Each cable has an effective crosssectional area Ae = 0.017 in2. (a) Find the tensile force T and normal stress σ in each cable. (b) If each cable elongates δ = 0.01 in. due to the weight of both the crate and the tailgate, what is the average strain in the cable?

The rigid element ABCD is supported by a pin at C and two rods at A and D as shown in the figure. A load P is applied at B.[L₁ = 600 mm, A₁ = 67 mm², E₁ = 200 GPa, L₂ = 180 mm, A₂ = 647 mm², E₂ = 100 GPa, a = 600 mm, b = 350 mm, c = 300 mm, and P = 64 kN] T a. Determine the axial force and normal stress in in rod 1 and rod 2 b. Determine the displacement at point A and D

The figure shows a cantilever of length L=4 m consisting of steel angles size of 100 x 100 x 12 mm mounted back to back. The cantilever is subjected to a point load P=2000 N acting at a= 2.25 m and a distributed load w=1000 N-m-¹ NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. W Gr Find the maximum stress in the beam. The maximum stress in the beam is P MPa B X

Q1 (а) A hollow circular post ABC as shown in Figure Q1 (a) supports a load P, = 65B5 N acting at the top. P2 is applied around the cap plate at B. The outer diameters and thicknesses of the upper and lower parts of the post are dAB = 30 mm, tu =1A mm, dzc = 50 mm, and t3c =9 mm , respectively. A=1 B=0 (i) Calculate the normal stress o AR on the upper part of the post. (ii) If it is desired that the lower part of the post have the same compressive stress as the upper part, what should be the magnitude of the load P,? (111) If Pi remains at 65B5 N and P2 is now set at 10050 N, what is the new thickness of BC that will result in the same compressive stress in both parts?

In Figure 1.2, the horizontal rigid beam ABCD is supported by vertical bars (1) and (2) and is loaded at points A and D by vertical forces P = 30 kN and Q = 40 kN, respectively. Assume that the dimensions a = 2.5 m, b = 2 m and c = 1.5 m. Determine the internal force of each bar. Answer: A a f₁ = 37.5 kN, f₂ = 32.5 KN L₁ B (1) b L₂ C (2) -X,U D

Find the forces in CE and DE of the truss shown in Figure (6) below (indicate tension or compression). Assume all joints are pinned. "tan (2+5) = 56.3² H pe 0.67 B 1m 1m C 1KN 1m 1m 1m F Figure (6) FDE = 0.4 kN (C) & FCE = 0.67 kN (T) 10% bis -75 0.75m G PNG 6-3-1+NG 3 NG= mbination of the method of joints

Gkuestrons T ØD VP The figure (not drawn to scale) shows a metallic cylindrical column submitted to a combined load: bending and torsion. The column contains an hemispherical groove of radius r, located at a distance L from the point of application of the loads. You are given the column diameter D = 68 mm, the groove radius r = 6 mm, the distance L= 200 mm, the bending load P=5 kN, and the torque T = 600 N.m. The material data are Young's modulus E = 122 GPa Shear Modulus G = 55 GPa Poisson's ratio v= 0.1 and Yield strength oy = 380 MPa. a) Write a numbered list of the calculation steps required to obtain the factor of safety in yielding based on the maximum distortion energy (Von Mises) criterion.

3. The bar shown below is composed of two pieces, AC and CD. The bar is attached to the wall at point A. The length L = 10 in. The cross sectional areas are: AAC = 4 in? and AcD = 2 in?. The Young's Moduli are: EAC =20 Msi and Ecd= 15 Msi Two forces are applied at points B and D: PB = 50 kips and PD = 20 kips. Determine: (a) the reaction force at A (specify –→ or +) and (b) the deflection of point D (specify → or +). (Hint for (b): Think about how many pieces you must subdivide the rod into.) Ans: RA = 30 kips (+), dp = 7.9167×10-3 in (E) A В C D Pp L 2L L

Axial loads are applied with rigid bearing plates to the solid cylindrical rods shown in the figure.  One load of P=33P=33 kipskips is applied to the assembly at A, two loads of Q=30Q=30 kipskips are applied at B, and two loads of R=35R=35 kipskips are applied at C.  The normal stress magnitude in aluminum rod (1) must be limited to 1717 ksiksi.  The normal stress magnitude in steel rod (2) must be limited to 3030 ksiksi.  The normal stress magnitude in brass rod (3) must be limited to 2121 ksiksi.  Determine the minimum diameter required for each of the three rods.

The pins at B and D in the figure apply an axial load to diagonal bracing member BD. If BD has a rectangular cross-section measuring 0.50 in. X 2.00 in., what is the axial stress in member BD when the load is w0=220 lb/ft?