Stopping distance are important for drivers to avoid any accident that could happen . Stopping distance is the distance you travel before you hit the other car. It's the total of two parts reaction distance and breaking distance. Reaction distance is the distance moved during thinking time before braking so the car in this time is still moving. Breaking distance generally defined as the distance traveled of a car after applying its brakes to where the car will stop. Many variables affect the braking distance. The most important is the velocity of the car, the higher your speed the longer it will take you to stop. The friction between the roadway and your tires can influence your braking distance also the weight of the car, the more weight cause lower breaking distance .
The National Safety Council (NSC) is a non-profit, non-government agency. It gives people specially drivers some driving rules and to be aware about the important of safety. These driving rules are:
1. Seatbelts (Wear Seat belt before starting the car engine)
2. Speed (Drive at speed limit of the road)
3. Never drink while driving.
4. Distracted driving (do not play with phone, calling or sending messages)
5. Road rules (follow the signs and the road rules)
6. Defensive driving (make a distance between your car and others)
How to calculate the stopping distance
for a car:
F: the friction force between tires and
the road.
µ: the coefficient of friction.
mg: the weight of the car.
Vo: the velocity of the car.
d: the distance traveled till the car stop.
V2: the final velocity which is zero.
KE: Kinetic Energy.
W: work by friction force.
Equation is :
KE =
W = µmgd
In order to stop the car, the friction force of the road must do enough work on the car to reduce its kinetic energy to zero.
µmgd =1/2 mvo
So to calculate distance we use this equation:
d = vo/2mg
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