Prob. 3.5-14. A rigid beam AD is supported by a smooth

pin at B and by vertical rods attached to the beam at points

A and C. Neglect the weight of the beam, and assume that

the rods are stress-free when P=0. With Fig. P3.5-14 and

the data below, (a) solve for the forces F and F in the

support rods, (b) determine the axial stress in each support

rod, and (c) calculate the elongation of support rod (1).

Assume that angle is very small.

A₁ 1.0 in¹, A,-0.50 in², L-L-4 ft

E₁-E₂10 × 10³ ksi

a-2 ft, b-4ft, P = 5 kips

(1)

P3.5-14, P3.8-14, P3.9-6, and P11.7-13

D