Fig. P$/.$y and r$/.$iu

$7\mathrm{.}10$ A semicircular rod is loaded as shown. Determine the internal forces at point $K.$

Fig. P$/\mathrm{.}11$ and P$/\mathrm{.}12$

$7\mathrm{.}11$ A semicircular rod is loaded as shown. Determine the internal forces at point $J$ knowing that $=30.$

$7\mathrm{.}12$ A semicircular rod is loaded as shown. Determine the magnitude and location of the maximum bending moment in the rod.

$7\mathrm{.}13$ The axis of the curved member $AB$ is a parabola with vertex at $A.$ If a vertical load $P$ of magnitude $450$ lb is applied at $A,$ determine