It is easier to avoid unpleasant situations on the road if you know which way your car is going to complete braking. For example, the braking distance of a passenger car at a seemingly low speed of sixty kilometers per hour is eighteen meters on a dry road, and on a wet one - all thirty.
Instructions
Step 1
The braking distance is the distance the vehicle travels when braking. The beginning of the braking distance is the moment when the braking system of the car is activated, and its end is the moment when the car stops completely.
The length of the braking distance depends not only on the speed at which the car is moving, but also on its weight, tire quality and wear, the condition of the road surface and weather conditions.
Step 2
There are several formulas for calculating the stopping distance. They are based on Newton's second law.
In order to calculate the braking distance using these formulas, it is necessary to know the acceleration, the mass of the car and the friction force (or the acceleration of gravity and the coefficient of friction).
Step 3
There is also a universal formula for calculating the stopping distance, which uses fixed coefficients, so it is much more convenient to use than the others. It looks like this:
braking distance = vehicle speed squared multiplied by the braking rate divided by the traction coefficient multiplied by 254.
The braking coefficient for passenger cars is 1 and increases in proportion to the dimensions of the vehicle. So, for a truck, this coefficient will be equal to the maximum value - 1, 2.
The coefficient of adhesion to the road depends on weather conditions (the worse the road, the lower the coefficient will be) and is:
0, 7 - for dry roads, 0, 4 - for wet roads, 0, 2 - for a snowy road, 0, 1 - for icy asphalt.
Step 4
When using the universal formula for calculating the stopping distance, it must be borne in mind that it does not take into account such important factors as the exact mass of the vehicle, tire wear and the vehicle's braking system, so the resulting result may have an error of up to several meters.
