Block A has a mass of 4 kg and B has a mass of 6 kg. A spring, having a stiffness of k =...

Block A has a mass of 4 kg and B has a mass of 6 kg. A spring, having a stiffness of k = 40 N/m, is attached to B and is compressed 0.3 m against A as shown. Determine the maximum angles θ and ∅ of the cords after the blocks are released from rest and the spring becomes unstretched.