Question 3 (100 marks) (a) (40 marks) Two blocks A and B (Figure 3) have a weight of WA = 53.5 kN and WB = 30 kN respectively. They are connected together with a cable and placed on the inclined plane. If the angle e is gradually increased, determine 0 when both the blocks begin to slide. The coefficients of static friction are = 0.15 and B = 0.25. B A Figure 3 (b) (20 marks) If the cable CD is replaced by a spring with a stiffness k = 40 N/m, determine the angle e for which both blocks begin to slide. Also find the required stretch or compression in the connecting spring for this to occur. (c) (40 marks) With the same spring as in Question 3(b), determine the angle which will cause motion of one of the blocks. What is the friction force under each of the blocks when this occurs?