a boat is sailing north of east at a speed of 2.00 . thirty seconds later, it is sailing north of east at at a speed of 4.00 . during this time, three forces act on the boat: a force directed north of east (due to an auxiliary engine), a force directed south of west (resistance due to the water), and (duc to the wind). find the magnitude and direction of the force . express the direction as an angle with respect to due east.