A boat has a mass of 5680 kg. Its engines generate a drive force of 3380 N due west, while the wind exerts a force of 990 N due east and the water exerts a resistive force of 1310 N due east. Take west to be the positive direction. What is the boat's acceleration, with correct sign?

1 answer

F = ma

just add up the vectors, after dividing by the mass.