.*3-40. The spring has a stiffness of k = 800 N/m and an unstretched length of 200 mm. Determine the force in cables BC and BD when the spring is held in the position shown. 400 mm k = 800 N/m B 300 mm D 500 mm 400 mm.*3-44. A scale is constructed using the 10-kg mass, the 2-kg pan P. and the pulley and cord arrangement. Cord BCA is 2 m long. If s = 0.75 m. determine the mass D in the pan. Neglect the size of the pulley. 1.5 m 1.5 m B