Final answer:
The best way to negotiate a curve is to enter at a speed that allows you to avoid braking during the curve, apply gradual power throughout, and consider road conditions. The slope of a banked road assists in maneuvering curves, with steeper banks allowing for faster speeds.
Step-by-step explanation:
When negotiating a curve, you should a. Enter at a speed that does not require you to brake while in the curve, b. Enter at a speed that allows you to apply gradual power while in the curve, c. Take the road conditions into account, and d. All of the above. The correct answer is d. All of the above.
Banked curves are designed in such a way that the slope of the road assists in negotiating the curve. The ideal speed on a banked curve is the maximum safe speed at which a vehicle can turn without the aid of friction between the tire and the road. If a vehicle goes slower than the ideal speed on a banked curve, friction is required to prevent sliding. The angle of the bank and the ideal speed are related, where a steeper angle allows for higher speeds and vice versa for a given curve radius. Conditions such as the coefficient of friction play a crucial role, especially for speeds other than the ideal.