Final answer:
When a person is driving in a car with a curb underneath the tire, it means the car is on a curved road and the curb acts as a boundary or edge. The car can navigate the curve safely because of centripetal force, provided by the friction between the tires and the road.
Step-by-step explanation:
When a person is driving in a car and there is a curb underneath the tire, it means that the car is on a curved road with the curb acting as a boundary or edge of the road. This situation is related to the concept of centripetal force in physics, which allows the car to navigate the curve without sliding off the road.
The friction between the tires and the road provides the necessary centripetal force. As the car goes around the curve, the tires push against the road and the road pushes back, preventing the car from skidding off. The angle of the curve and the speed at which the car is traveling determine whether it can safely navigate the curve.
For example, a steeply banked and sharp curve with a higher friction coefficient between the tires and the road will allow the car to take the curve at higher speeds. On the other hand, a flat or less banked curve with less friction may require the car to slow down in order to maintain contact with the road.