An object with a mass of #4 kg# is acted on by two forces. The first is #F_1= < -5 N , 2 N># and the second is #F_2 = < 1 N, 6 N>#. What is the object's rate and direction of acceleration?
The resultant force is
we use Newton's second Law
The magnitude of the acceleration is
The direction is
But the angle is in the 2nd quadrant