1.2-2 Calculate the compressive stress o, in the circular piston rod (see figure) when a force P = 40 N is applied to the brake pedal. Assume that the line of action of the force P is parallel to the piston rod, which has diameter 5 mm. Also, the other dimensions shown in the figure (50 mm and 225 mm) are measured perpendicular to the line of action of the force P. 50 mm 5 mm 225 mm P = 40 N Piston rod PROB. 1.2-2

Try One scene 7 of 7 The bar has a 90 mm by 20 mm rectangular cross section. If P = 80 kN, determine the force components perpendicular (N) and parallel (V) to a – a, the inclined surface area, and the normal and shear stress magnitudes acting on surface a – a. 90 mm 62° a N kN kN Aa-a mm2 P = 80 kN MPa MPа Try one 1st 2nd 3rd Enter attempt