Changes

*The conditions of the road and tyres - The less [[friction]] between the road and tyres the longer the [[Braking Distance|braking distance]]. Water, oil or ice on the road all reduce the [[friction]] between the tyres and the road, causing the '''braking distance''' to be greater than for a dry road.: Different road surfaces have different amounts of [[friction]]. The painted lines on the road and the metal of a manhole cover are both low [[friction]] surfaces which are especially dangerous for motorcycles which only have two wheels (at least with 4 wheels a car will have 3 of them on the normal road with 1 on the slippery surface of a line or manhole cover).*The condition of the brakes, if they are in poor condition there will not be enough [[friction]].*The [[mass]] of the car. The mass a car has the more [[force]] is required to slow it down 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.