A block with mass m = 15 kg rests on a frictionless table and is accelerated by a spring with spring constant k = 4234 N/m after being compressed a distance x1 = 0.536 m from the spring's unstretched length. The floor is frictionless except for a rough patch a distance d = 2.6 m long. For this rough path, the coefficient of friction is μk = 0.47.