- average speed = total distance/ time taken
- acceleration = change in speed/ time taken
Stopping distance
- thinking distance + braking distance
Thinking distance
- distance travelled
- after seeing a hazard
- until
- first touching the brake
Factors
- drugs/ alcohol
- tiredness
- distractions
- speed
Braking distance
- distance travelled after
- first touching the brake
- until
- coming to a full stop
Factors
- quality of brakes/ tyres
- wet/ icy roads
- speed
Dangers of large decelerations
- large deceleration
- large force
- bigger impact/ chance of injury
- safety: seatbelts, helmets, airbags, crumple zones
- they increase the distance or time during deceleration, which reduces force, which reduces impact.