Answer:
Any car that is accelerating or decelerating will experience a resultant force that is not zero. This is because according to Newton's Second Law, the acceleration of an object is directly proportional to the net force acting on it. If there is a net force acting on a car, it will either speed up or slow down.
For example, if a car is accelerating forward, the force applied by the engine in the forward direction will be greater than the resistive forces (such as friction and air resistance) acting in the opposite direction, resulting in a net force in the forward direction. Similarly, if a car is braking to slow down, the force applied by the brakes will be greater than the forward force of motion, resulting in a net force in the opposite direction of motion.
Therefore, any car that is accelerating or decelerating will experience a non-zero resultant force.