1.42 Link AB is to be made of a steel for which the ultimate normal stress is 65 ksi. Determine the cross-sectional area of AB for which the factor of safety will be 3.20. Assume that the link will be adequately reinforced around the pins at A and B. 600 lb/ft 35° OE B D 5 kips 1.4 ft 1.4 ft 1.4 ft

Q.1//The bar AD is considered to be absolutely rigid and is horizontal before the load of 200 KN is applied. The connection at 4 is a pin, and AB is supported on the steel rod BE and the copper rod CF. The length of BE & CF is 250 mm. The cross sectional area of CF is 400 mm, the area of BE is 200 mm. Determine the stress in each of the vertical rods.. The weights of all bars are negligible. For copper E-120 GPa, for steel E-200 GPa. 200 KN A B. 1.5 m 500 mm 500 mm 250 mm steel copper

(a)  Identify the zero-force members in the trusses shown. Do not compute any force.

Q2/ Segments AB and BC of the assembly below are made from 6061-T6 aluminum. If a couple forces P = 5 kip are applied to the lever arm, Determine (a) the reactions at the fixed supports A and C and (b) the shear stress developed at a point located 1 in. from the center-line of the bar at a cross-section close to point A. 2.5 fi 2.5 ft 6 ft 4 in. 4 in.