Problem $2$

A $400$ lb vertical force is applied at $\backslash ($ D $\backslash )$ to a gear attached to the solid $1$ in $.$ diameter shaft $\backslash ($ A B $\backslash ).$ Determine the state of stress at points $\backslash ($ H $\backslash )$ and $\backslash ($ K $\backslash ).$ Include pictures and diagrams