Two identical bars AB and BC support a vertical load P (see figure). The bars are made of steel having a stress-strain curve that may be idealized as elastoplastic with yield stress Y . Each bar has...

Two identical bars AB and BC support a vertical load P (see figure). The bars are made of steel having a stress-strain curve that may be idealized as elastoplastic with yield stress

_Y. Each bar has cross-sectional area A.

Determine the yield load P_Y
and the plastic load P_P.