Final answer:
The proper way to go down long grades is to use a low gear and apply light pressure on the brakes. By doing so, you can control your speed and prevent brake overheating.
Step-by-step explanation:
The proper way to go down long grades is to use a low gear and apply light pressure on the brakes. By shifting to a lower gear, such as second or third, you can control your speed without overusing the brakes. Applying light pressure on the brakes intermittently helps to prevent the brakes from overheating and maintains their effectiveness.
When descending a hill, the force of gravity increases the vehicle's speed. By using a low gear, you take advantage of the engine's resistance and friction to slow down the car without relying solely on the brakes. This technique helps to prevent brake fade and overheating, which can lead to a loss of braking power.
Letting up on the brakes from time to time to cool them down is not recommended as it can result in uneven braking and reduce the effectiveness of the brakes.