The bar ABCD is supported by a pin at A, a steel wire at B, and aluminum wire at D. Deterine the stress in steel and aluminum. Steel Aluminum A = 200 mm? L = 1.50 m A = 100 mm? L = 1.50 m E = 200 GPa E = 72 GPa A B D P = 80 KN 1.50 m 1.25 m 0.75 m

Q2: The pin-coected structure shown in figure below consists of a rigid member BED and three steel rods (E- 200 GPa). Each of the rods AB and CD has a 200 mm cross-sectional area and rod EF has a 625 mm2 cross-sectional area. If a load of P- 36 KN is applied at E, determine: (a) the change in length of rod EF. (b) the stress in each rod. 300 mm P-36 kN 300 mm 400 mm * 500 mm

The shaft is made of A992 steel. It has a diameter of 0.7 in. and is supported by bearings at A and D, which allow free rotation. The shear modulus of elasticity for the material is 11 × 10³ ksi. 2 ft < 5 of 7 Part A B 2.5 ft > 60 lb-ft C 3 ft O 60 lb-ft

The assembly shown in figure below consists of a light rigid bar AB, pinned at O, that is attached to the steel and aluminum rods. In the position shown, bar AB is horizontal and there is a gap, A = 5 mm, between the lower end of the steel rod and its pin support at C. Compute the stress in the aluminum rod when the lower end of the steel rod is touch to its support. A 0.75 m Steel A = 250 mm E = 200 GPa *i* O 1.5 m Aluminum L = 2m A = 300 mm' E = 70 GPa B D