I have a problem where I'm considering a curved member of circular cross section bent in the shape of a half circle and fixed at the base. A force is applied perpendicular to it (so in the picture, the dot is the force going 'into' the screen at the top view) and I'm trying to find the bending stress at the base. Can I approach this as a simple Mc/I situation with c being half the diameter of the rod, and M being the distance of F to the base? I'm confused, though, on what I would use for the area moment of Inertia. Any assistance would be appreciated. Thank you.