(Solved):   2. The steel bar shown in Fig. 1 has a 4in \( x \) lin rectangular cross-section and is us ...

 

2. The steel bar shown in Fig. 1 has a 4in \( x \) lin rectangular cross-section and is used to carry an axial tensile load P. If the normal and shearing stresses on the plane ab must be limited to \( 25 \mathrm{ksi} \) and \( 15 \mathrm{ksi} \), respectively, find the maximum load \( \mathrm{P} \) that can be carried by the bar if \( \theta=30 \mathrm{deg} \). Fig. 1