An object weighing 32 lb is released from rest 50 ft above the surface of a calm lake. Before the object reaches the surface of the lake, the air resistance (in lbs) is given by 2v, where v is the velocity (in feet per second). After the object passes beneath the surface, the water resistance (in lbs) is given by 6v. Further, the object is then buoyed up by a buoyancy force of 8 lb. Find the velocity of the object 2 seconds after it passes beneath the surface of the lake.