The 60 kg block is supported by two springs having the stiffness shown. Determine the stretch of spring AC, S(AC): 0.4 m 0.3 m 0.4 m kac - 1.5 kN/m 1.2 kN/m Select one: a. S(AC) = 2.23 m b. S(AC) = 1.189 m O c. S(AC) = 0.2378 m d. S(AC) = 0.1189 m

The unstretched length of spring AB is 3 m. If the block is held in the equilibrium position shown, determine the mass of the block at D. Give your answer in kg and to 3 significant figures. 3 m- 3 m www. KAC = 20 N/m -4 m- www wwwww B KAB = 30 N/m

Problem 6 Two cables of the same gauge are attached to a transmission tower at B. Because the tower is slender, the horizontal component of the resultant of the forces exerted by the cables at B is to be zero. Knowing that the mass per unit length of the cables is 0.4 kg/m, determine (a) the required sag h, (b) the maximum tension in each cable. -90 m- A h B 60 m → 3 m Figure Problem 6 с