1. The problem statement, all variables and given/known data A boat has a sail that has a surface S towards the wind. The wind blows at constant velocity u. Also given the density of the air, p. Find the velocity of the boat as a function of time. What will be the velocity of the boat after a long enough time? What exactly is this "long enough" time? 2. Relevant equations 3. The attempt at a solution I figured I could write the forces equation, since I know that the force that the wind asserts on an object is proportional to its surface and to the velocity^2. k is some constant, So F = k*S*(u-v)^2 = ma But then I get a diff. equation with v, v dot, and v^2, which I dont know how to solve. Is there an easier way to solve this?