Repeat Prob. 124 for: (a) = F/A, where A = d2/4, F = 2 700 lbf,

Repeat Prob. 1–24 for:
(a) τ = F/A, where A = πd2/4, F = 2 700 lbf, and d = 0.750 in.
(b) σ = 32 Fa/πd3, where F = 180 lbf, a = 31.5 in, and d = 1.25 in.
(c) Z = π(d4o / di4)/(32 do) for do = 1.50 in and di = 1.00 in.
(d) k = (d4 G)/(8 D3 N), where d = 0.062 5 in, G = 11.3 Mpsi, D = 0.760 in, and N = 32 (a dimensionless number).