Example: 2. A compression helical spring is made from alloy steel wire of 5 mm diameter and has outside diameter of 80 mm . If the permissible shear stress is 375 MPa and modulus of rigidity \( 85 \mathrm{kN} / \mathrm{mm}^{2} \), determine the axial load which the spring can carry and the deflection per active turn.Take all the factors into account.
Given : d
\[
\begin{array}{ll}
\mathrm{d} & =5 \mathrm{~mm} \\
\mathrm{D}_{0} & =80 \mathrm{~mm}
\end{array}
\]
