GCSE Combined Science (AQA)

622 videos | 38 hours

Road Conditions

Please subscribe to watch this video.

This, and all other videos, are included in our premium subscriptions.

Premium accounts get access to all videos.

Forces Forces and motion

Road Conditions

2:57 Saftey when Stopping
Spec 4.5.6.3.3
Previous Vehicle Conditions Next Momentum
  • Braking forces depend on friction between the road and car tires.
  • Applying brakes stops tire spinning, increasing friction and slowing the car.
  • Reduced friction increases braking distance, the distance a car travels after braking before stopping.
  • Overall stopping distance includes braking distance.
  • Less friction results in less deceleration and longer stopping time.
  • Wet roads reduce friction due to water acting as a lubricant, increasing braking distance.
  • Drivers should be cautious in rain; icy roads reduce friction even more.
  • Ice causes weak frictional forces, leading to long braking distances.
  • Drivers should drive slowly or avoid icy roads.
  • Road surface type affects braking force effectiveness.
  • Concrete roads have rough surfaces for more friction, allowing faster speeds and shorter braking distances.
  • Dirt roads have less friction, requiring slower, more careful driving.
  • Understanding road conditions is important for recalling and explaining their impact on stopping distances.

Please subscribe to access these revision notes.

This, and all other video notes, are included in our premium subscriptions.

Premium accounts get access to all videos and revision notes.