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What is the link between the braking distance and the thinking distance of stopping a car?
Wiki User
∙ 14y ago
A distracted driver will have a greater reaction time than a non-distracted driver. A distraction to a driver will increase the drivers' reaction time and reduces the ability to respond to an emergency situation. The driver takes longer to react and more time passes between seeing the hazard and starting braking, so the car travels a greater distance before it comes to a stop.
Two important factors to take into account for calculating stopping distances are reaction time and breaking distance.
Reaction time
For average drivers it takes 1.5 seconds to react to an emergency situation. For a distracted driver it may take as long as 3 seconds. A focused driver driving at 60km/hr will travel approximately 25m before they react, and a distracted driver driving at 60km/hr will travel approximately 33m before they react.
Braking distance
The breaking distance of a car depends on a number of variables. The slope of the roadway; a car will stop more quickly if it is traveling uphill because gravity will help slow the vehicle. The frictional resistance between the road and the tyres of the car is also important. A car with new tyres on a dry road will be less likely to skid and will stop more quickly than one with worn tyres on a wet road. If the slope and frictional resistance are equal, the factor that has most influence on braking distance is the initial speed.
Formula used for calculating braking distance:
d = V /(2g(f + G))
Where:
d is the Braking Distance (m)
g is the Acceleration due to gravity (9.8m/s^2)
G is the Roadway grade
V is the Initial vehicle speed (m/s)
f is the Coefficient of friction between the tires and the roadway (u)
A more simple formula used to calculate braking distance can be derived from a general equation of physics. Ignoring friction, and the roadway grade
v = u - 2ad
where:
v is the final velocity (m/s)
u is the initial velocity (m/s)
a is the acceleration (m/s^2)
d is the distance traveled during deceleration(m)
Since we know that v will be zero when the car has stopped, the equation can be re-written as
d = u/2a
The total distance it takes for the car to come to a stop can be found by adding the reaction distance to the braking distance.
Wiki User
∙ 14y ago
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What is the thinking distance the braking distance and the overall stopping distance for a veichle travelling at 20mph?
10 meters for thinking distance and 17 meters for stopping
What determines the stopping distance?
Stopping distance as in braking distance: Braking distance refers to the distance a vehicle will travel from the point where the brakes are fully applied to when it comes to a complete stop. It is affected by the original speed of the vehicle, the type of brake system in use, the reaction time of the driver/rider and the cefficient of friction between the tires and the road surface.
How does friction affect the motion of a vehicle in the context of tire surface road conditions including skidding braking force braking distance thinking distance and stopping distance?
Tyre surface: If the tyre is new, it will have surface with depressions which will offer more friction compared to old tyre whose surface-depressions are worn out and it is more flat, so it offers less friction. Therefore, new tyre will have less stopping distance, as force of friction is more. Thinking distance is affected neither by friction between tyre and road, nor by friction between brake and tyre. If road has a wet surface, it has less friction so the vehicle will skid farther, and vice versa. The braking force, i.e, friction between tyre and brake is unaffected by road condition or tyre surface. Hence the distance the vehicle travels WHILE retarding due to "braking force", is not same as stopping distance, because even when the wheels are stopped rotating due to braking force, the car will skid a little distance- this total distance is the stopping distance.
What factor besides speed is important when calculating braking distance?
driving safely Things that affect braking distance consist of the following factors: * speed at which you're travelling * weight of the car * road conditions * braking efficiency * friction between the road surface and your tires What factors affect the thinking distance:
Double your speed double stopping distance?
When your speed is doubled, your braking distance is multiplied by four.
What is the thinking distance the braking distance and the overall stopping distance for a veichle travelling at 20mph?
10 meters for thinking distance and 17 meters for stopping
How are thinking distance and braking distance linked?
When you will observe the road far ahead of the front end of your car and keep proper distance between other cars, then you will have enough time for thinking and enough space for braking. But when intense situation happens, then the thinking and braking are solidified in one desperate move: to avoid a collision.
What is the relationship between a car's mass and its stopping distance?
The greater the mass of the car and its occupants the longer the stopping distance that is required for the vehicle. Stopping distance is calculated by taking into account car mass and reaction time in braking
Perception distance plus reaction distance plus braking distance is called?
Stopping Sight Distance
What determines the stopping distance?
Stopping distance as in braking distance: Braking distance refers to the distance a vehicle will travel from the point where the brakes are fully applied to when it comes to a complete stop. It is affected by the original speed of the vehicle, the type of brake system in use, the reaction time of the driver/rider and the cefficient of friction between the tires and the road surface.
What three things add up total stopping distance?
Perception Distance + Reaction Distance+ Braking Distance.
What tree things add up to total stopping distance?
Perception Distance, Reaction Distance and Braking Distance
What does your total stopping distance includes?
The total stopping distance includes the perception distance, reaction time and braking distance. The distance that your vehicle is traveling and then pressing on the brake after seeing a hazard, is the total stopping distance.
The sum of the braking distance and the perception and reaction time?
It is the total stopping time.
What is the formula for braking distance?
The minimum distance in which a vehicle can be brought to rest in an emergency from the moment that the driver notices danger ahead. Stopping distances of vehicles can be estimated by using the formula: stopping distance = thinking distance + braking distance The thinking distance is the time taken for the driver to react by applying the brakes of the vehicle. This is known as the reaction time, and is about 0.1-0.3 seconds. As a general rule the breaking distance becomes four times greater as the speed of the car is doubled.I found this info athttp://www.tiscali.co.uk/reference/encyclopaedia/hutchinson/m0030390.html
What equals Stopping Distance?
Stopping distance for a motor vehicle is a combination of two factors.First the reaction time of the driver.Then the braking distance of the vehicle once the driver has reacted and applied the brakes.The two equal the stopping distance.
What is the stopping distance for a vehicle traveling at 30 mph?
When traveling 30-mph, the braking distance is 45-feet, and the total stopping distance is 75-feet. This is the length of a semi-truck and trailer.
