Calculate the compressive stress ac in the piston rod (see figure on page 38) when a force P = 36 N is applied to the brake pedal. (The diameter of the rod is 5 mm. The other dimensions shown in the figure are perpendicular to the line of action of the force P, which is parallel to the piston rod.)
![428_88f64250-2061-4a28-adae-f4733ad31a96.png](https://secure.tutorsglobe.com/CMSImages/428_88f64250-2061-4a28-adae-f4733ad31a96.png)