Tutorial Example Shigley

A certain Force F applied at D near the end of the $425$ mm lever shown above, which is quite similar to a socket wrench, results in certain stresses in the cantilevered bar OABC. This bar $($OABC$)$ is of AISI $1035$ steel, forged and heattreated so that it has a minimum yield strength of $570$ MPa $.$ The force F to initiate yielding can be regarded as the strength of the component part. Find this force.