5-17* A structural steel and

{

(

:\\\\gamma =0.284l(b)/(i)n^(3))

} bar of rectangular cross section consists of uniform and tapered sections as shown in Fig. P5-17. The width of the tapered section varies linearly from 2 in. at the bottom to

5in

. at the top. The bar has a constant thickness of

(1)/(2)in

. Determine the elongation of the bar resulting from application of the 30-kip load

P

and the weight of the bar.

5-17* A structural steel (E=29,000ksi and =0.284lb/in3) bar of rectangular cross section consists of uniform and tapered sections as shown in Fig. P5-17. The width of the tapered section varies linearly from 2 in. at the bottom to 5 in. at the top. The bar has a constant thickness of 1/2 in. Determine the elongation of the bar resulting from application of the 30-kip load P and the weight of the bar