2. A boat is being towed at a rate of 12mi/hr. At t=0, and a man in the boat begins to row, in the direction of motion, exerting a force of 20lbs. The water resists the motion with a force equal to...

2. A boat is being towed at a rate of 12mi/hr. At t=0, and a man in the boat begins to row, in the direction of motion, exerting a force of 20lbs. The water resists the motion with a force equal to 1.75v lbs, where v is the velocity of the boat in feet per second. The combined weight of the man and the boat us 480lb. Derive a differential equation governing the velocity of the boat.