Final answer:
The forces acting on a parked car are balanced, with a net force of 0 N, meaning that according to Newton's first law, the car remains at rest with zero acceleration.
Step-by-step explanation:
The forces acting on a parked car can be best described as being balanced forces. When a car is parked, all forces on the car are equal and opposite, resulting in a net force of 0 Newtons (N). This means that according to Newton's first law of motion, the car remains in a state of rest with an acceleration of zero. The force of gravity pulling the car towards the Earth is perfectly balanced by the normal force of the ground pushing up against the car, and if there are any other forces, such as friction or air resistance, they are also balanced.