Two structural members are shown: one is straight and the other is semicircular. Neglect t...

Two structural members are shown: one is straight and the other is semicircular. Neglect the weight of the members.

(a) For the straight member, show that the internal forces acting on cross section C are V = 0, N = - P, and M = 0.

(b) For the semicircular member, show that the internal forces acting on cross section C are V = -P cos θ, N = -P sin θ, and M = -Pr sin θ.

Figure P8.21