An object with a mass of #3 kg# is acted on by two forces. The first is #F_1= < -2 N , -3 N># and the second is #F_2 = < -1 N, 6 N>#. What is the object's rate and direction of acceleration?
Newton's 2nd law
Breaking that vector into a scalar and a direction:
in terms of direction, we can dot product it against the unit x vector ,