Apply what you know about forces to hypothesize how balanced and unbalanced forces acting on a moving car would affect the motion of the car.

If an object has a net force acting on it, it will accelerate. The object will speed up, slow down or change direction. An unbalanced force (net force) acting on an object changes its speed and/or direction of motion. An unbalanced force is an unopposed force that causes a change in motion.

thus the car would get its speed, and or direction mixed up