How does a banked curve assist in turning?

A banked curve is designed to assist vehicles in making turns more effectively while maintaining speed. The important aspect of a banked curve is that it allows the normal force acting on the vehicle to be tilted, which introduces a horizontal component of this force that can contribute to the centripetal force needed to navigate the curve.

When a vehicle travels along a banked curve, the angle of the banking (the slope of the road) optimally aligns with the required centripetal force that keeps the vehicle in circular motion. The component of the normal force that acts horizontally helps counteract the inertial force that pushes the vehicle outward during the turn. This design effectively reduces reliance on friction; at the ideal banking angle, the vehicle can navigate the curve without requiring any additional traction from friction. This is particularly useful in maintaining higher speeds without skidding.

The other options describe factors that do not accurately represent the primary function of a banked curve. Increasing frictional force isn't necessary for the banked curve to work effectively; rather, it can reduce the demand for friction. Additionally, while banking helps manage acceleration, it does not eliminate the need for it altogether, as a vehicle must still accelerate towards the center of the curve to maintain circular motion. Lastly,