Question

If a 990 kg car is traveling on the road and the Ff is 360 N to the east and the applied force is 1330 N to the west, what is the net force? Choose the best answer. (Remember to draw a force diagram to solve).

Answer 1

(1330N-west + 360N-east) = (1330N-west - 360N-west) = 970N-west .

All that business about a car, its mass, where it is, and where
it's going just gets in the way. None of it is needed.

By the way . . . you asked us to "choose the best answer". From what ?