Examkin

Soru

Zorluk: KolayFactors Affecting Braking Distance

While travelling at 50 mph on a wet road, you need to bring your vehicle to a complete stop. Which of the following will directly increase your vehicle's braking distance?

  1. A
    Driver tiredness causing delayed reaction times
  2. Worn tyres with insufficient tread depthCevap
  3. C
    Failing to double the following distance behind the vehicle ahead
  4. D
    Harshly pumping the footbrake during an unexpected skid

Cevap

Worn tyres with insufficient tread depth
Worn tyres with low tread depth have a compromised ability to displace surface water, leading to reduced friction between the tyre rubber and the road surface. This physical loss of grip directly extends the distance the vehicle travels while the brakes are being applied.

Adım Adım Çözüm

1
Identify the components of total stopping distance
Total Stopping Distance = Thinking Distance + Braking Distance
Thinking distance depends on driver perception and reaction, whereas braking distance depends on vehicle condition, speed, and road grip.
2
Differentiate driver-related factors from vehicle and road friction factors
Driver fatigue and separation distance errors relate to perception/buffer, whereas tyre tread depth directly governs tyre-to-road friction.
Worn tyre tread reduces water dispersal, diminishing frictional grip and extending the physical distance required to bring the vehicle to a halt.

Anahtar Kavram

Braking distance is determined by the physical friction between tyres and the road, vehicle braking efficiency, road surface conditions, and vehicle weight, distinct from thinking distance.
Tahmini Süre:45s
Bu soruyu puanla

Konular

Factors Affecting Braking Distance

Bu konudan daha fazla soru