Final answer:
In case of brake failure on a downgrade, start by pumping the brake pedal, then use the emergency brake and shift to a lower gear to help slow down the car. Look for an escape route like an escape ramp or an uphill area to steer into for additional aid in stopping.
Step-by-step explanation:
If your brakes fail on a downgrade, it's critical to respond calmly and use alternative braking methods. The original statements you provided suggest an experiment to measure braking distance or time, but they are not immediately relevant to the situation of brake failure on a downgrade. When experiencing brake failure while driving downhill:
- First, try pumping the brake pedal
- If pumping doesn't work, gradually apply the emergency brake
- Shift to a lower gear to let the engine help slow the car
- Look for a safe area to steer into that will help slow down the vehicle, such as an escape ramp or uphill area
It's important to stay calm and think clearly despite the stressful situation, using the above methods to bring the vehicle safely to a stop.