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→Key Stage 4
*The [[speed]] of the vehicle - The greater the [[speed]] the larger the '''stopping distance'''.
*[[Thinking Distance]]
**The [[Human Reaction Time|reaction time]] of the driver - The longer the [[Human Reaction Time|reaction time]] the longer the [[Thinking Distance|thinking distance]]. This is affected by [[Alcohol (BiologyDrug)|alcohol]], [[drug]]s and tiredness.
*[[Braking Distance]]
**The conditions of the road and tyres - The less [[friction]] between the road and tyres the longer the [[Braking Distance|braking distance]] and therefore '''stopping distance'''.
**The condition of the brakes, if they are in poor condition there will not be enough [[friction]].
**The [[mass]] of the car. The more [[mass ]] a car has the more [[force]] is required to slow it down ([[Newton's Second Law]]) so brakes providing a constant [[force]] won't be as effective. ''Higher: See [[Inertial Mass]]''.
**[[Weather]] conditions - Ice reduces friction with the road making braking distance longer.