(Solved): The pole is supported by two cables as shown in the Figure 2 and it has a diameter equal to \( 25 ...

The pole is supported by two cables as shown in the Figure 2 and it has a diameter equal to \( 25 \mathrm{~mm} \). The tumbuckles in the cables are tightened until the stress in the cables reaches \( 400 \mathrm{MPa} \). If the ultimate compressive stress for wood is \( 1.4 \mathrm{MPa} \), determine the smallest permissible diameter of pole. (5pts)