GCSE Physics (AQA)

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Vehicle Conditions

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Forces Forces and motion

Vehicle Conditions

3:47 Saftey when Stopping
Spec 4.5.6.3.3
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  • Braking force is the force a car exerts on itself to slow down.
  • Applying brakes creates friction between the tires and the road, stopping the tires from spinning.
  • Braking force is directed opposite to the car's motion.
  • According to Newton's second law (F=ma), the braking force causes deceleration since it is directed opposite to motion.
  • A greater braking force results in a shorter braking distance for a given speed.
  • Braking distance is part of the overall stopping distance of a car.
  • Cars with stronger braking forces decelerate faster and have shorter braking distances.
  • Braking force can be affected by the condition of the brakes and tires.
  • Worn or damaged brakes and tires result in weaker braking forces and longer braking distances.
  • It's crucial to maintain the condition of both brakes and tires to ensure safety and compliance with road regulations.
  • Worn tires have less effective groove patterns, reducing friction with the road and weakening the braking force.
  • For exams, focus on how worn brakes and tires affect braking distances and be able to explain these effects.

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