5. The rigid bar BC shown is supported by the steel rod AC of cross-sectional area of 0.25 in^2. Find the vertical displacement of point C caused by the 2400-lb load. Use E=3010 psi for steel. Answer: Δv=0.097 in.
6. The distributed loading is supported by the three suspender bars. AB and EF are made of aluminum and CD is made of steel. If each bar has a cross-sectional area of 450 mm^2, determine the maximum intensity of the distributed loading so that the allowable stress (allow_st=180 MPa in the steel and allow_al=94 MPa in the aluminum) is not exceeded. E_st=200 GPa and E_al=70 GPa. Assume ACE is rigid. Answer: w=45.9 kN/m.