(Solved): A part of a racket in a machine assembly is shown in the Figure below. The load varies from \( 3.2 ...

A part of a racket in a machine assembly is shown in the Figure below. The load varies from \( 3.2 \mathrm{kN} \) to \( 0.7 \mathrm{kN} \). The bracket is made from SAE 1050 hot-rolled steel. The actual endurance strength of the material is \( 124 \mathrm{MPa} \), and the stress concentration factor is \( 1.2 \). Determine the followings: \( \begin{array}{ll}\text { The maximum stress } & (\mathrm{MPa}) \\ \text { The minimum stress } & (\mathrm{MPa})\end{array} \) The mean stress \( \quad(\mathrm{MPa}) \) The alternating stress (MPa) The resulting design factor \( (\mathrm{N}) \) by using the Goodman method \( \sigma_{m}=\frac{\left(\sigma_{m a x}+\sigma_{\min }\right)}{2} \) \( \sigma_{a}=\frac{\left(\sigma_{\max }-\sigma_{\min }\right)}{2} \) \( \sigma_{b}=\frac{M y}{I} \)