Friction Friction is defined as a force that opposes motion.
This calculator is designed to give an accurate projection of stopping distance of a normal passenger vehicle, based on data entered.
There are three sections for data. The first has to do with vehicle speed. The second is the co-efficient of friction and the third is the stopping distance. You may enter data in any of the boxes above.
The quantity will be calculated in the other unit fields within that section. Then click on the active text Stopping distance the calculate box for either stopping distance or vehicle speed to calculate that quantity.
The quantities will not be forced to be consistent until you click on the quantity to be calculated. If the fields are empty, you may click on either calculate text or button to fill in default information. That information is NOT as of yet calculated until the section having one or more empty fields is clicked.
You may change the data in any field, one at a time and then click on either of the calculate text or button areas. The calculations are extensive!
As of October,we are scheduled to begin work of additional capability to this Stopping distance that of Anti-Lock computer assisted disc brakes as opposed to conventional brakes.
As of Septemberwe are told that this calculator has been used in 17 court cases. If you are an attorney looking to use this in a case, please do not request assistance from us. We don't have the time. Do the research to see if this has been used in a jurisdiction that is similar to yours. Then and only then, we will assist you, at our normal technical time rates, if you wish to retain us.
To the best of our knowledge, it is a "one of a kind" calculator that is extremely accurate; we neither have the manpower nor financial resources to authenticate the accuracy or validity. It is offered for use on the Internet as a public service "as is". Note that this calculation implies a stopping distance independent of vehicle mass and of driver reaction time.
It also implies a quadrupling of stopping distance with a doubling of vehicle speed. One experiment with trained drivers asked the drivers to stop a vehicle on signal by 1 locking the wheels and 2 stopping as fast as possible without locking the wheels.
On dry flat concrete, the stopping distances were very nearly the same. Both tests yielded coefficients of friction near 0. The coefficient of kinetic friction is considerably less on a wet surface, or similarly less than optimum surfaces or in less than optimum conditions where the water can act as a lubricant.
It is also noted above that worn tires have a considerably smaller coefficient of kinetic friction than static friction. Stopping Distance For A Vehicle Assuming proper operation of the brakes on the vehicle, the minimum stopping distance for a vehicle is determined by the effective coefficient of friction between the tires and the road, and the driver's reaction time in a braking situation.
The friction force of the road must do enough work on the car to reduce its kinetic energy to zero. If the wheels of the car continue to turn while braking, then static friction is operating, while if the wheels are locked and sliding over the road surface, the braking force is a kinetic friction force only.
To reduce the kinetic energy to zero: Stopping Distance Calculation For calculating minimum stopping distance, a value of 0. Almost always, coefficients of kinetic friction are less, and are dramatically less for wet, icy, slick, sandy, dirty very smooth or oily surfaces. For many newer high performance tires with good tread, the coefficient of kinetic friction on a dry road surface may approach 0.The physics behind stopping distance I’m not a physicist.
But I happen to know someone with a master’s degree in mechanical engineering (who, coincidentally, now calculates risk as a homeowners actuary at Esurance).
Braking Distance is the distance your car travels after you have applied the brakes until your vehicle comes to a stop. The faster you are travelling, the more momentum you have and the braking distance will.
What is Stopping Distance? Stopping Distance is the total distance you travel before you hit the brakes plus the distance you travel while the brakes slow you down.
your total stopping distance would be feet, slightly more than a football field in length! Virtually all current production vehicles' published road braking performance tests indicate stopping distances from 60 mph that are typically to feet, slightly less than half of the projected safety distances.
Total stopping distance is a combination of Reaction Distance, Perception Distance, and Braking Distance. Perception and Reaction time each add 55 feet ( feet total) to your total stopping distance. Stopping distances include the distance travelled while the driver notices a hazard and applies the brakes (thinking distance), and while the vehicle comes to a full stop from its initial speed (braking distance).
The calculator below estimates the stopping distance for a well maintained car with an alert driver on a dry road. Obviously actual stopping distances will vary considerably depending on condition of the road and car as well as the alertness of the driver.