HELP ME please someone

Question

A 1.5 kg toy car is moving across a smooth floor with a velocity a 5.2 m/s. An unbalanced force of 2.4 N acts on the car in the direction of motion for 4.0 seconds. Determine the velocity of a car at the end of the interval.

Answer 1

By 2nd Newton law accelaration a = f/m = 2.4n/1.5kg = 1.6 m/s²;

Then v = v₀ + at = 5.2 m/s + 1.6 m/s²·4 s = 11.6 m/s