Final answer:
For parking uphill or downhill without a curb, turn your wheels to the right so the car would roll away from the center of the road. An ideally banked curve allows vehicles to navigate a curve at an ideal speed without relying on friction.
Step-by-step explanation:
When you are parking on an incline and there is no curb, the correct direction to turn your wheels depends on whether you're facing uphill or downhill. The general rule is to turn your wheels so that if your vehicle were to move, it would roll away from the center of the road or traffic.
For uphill parking without a curb, you would turn your wheels to the right, so the car rolls back and away from the center. For downhill parking, you would turn your wheels to the right as well, ensuring that if the car rolls, it moves towards the side of the road.
Regarding banked curves, these are designed to help a vehicle negotiate a curve at an ideal speed without relying on friction. An ideally banked curve has an angle that allows a vehicle to take the curve at a specific speed where the centripetal force required for the curve is provided entirely by the normal force of the road, without the need for friction.