Vehicle stopping distances

• what affects thinking distance

  speed

  reaction time

  concentration

  tiredness

  influence of alcohol
• what affects braking distance

  speed

  road conditions

  weight
• the greater the speed...

  the greater the reaction time
• how to measure reaction time

  ruler drop
• what happens when a force is applied to the brakes of a vehicle

  work is done by the brakes (by friction) onto the wheel

  the vehicles KE reduces

  temperature of brakes increase