23 meters on a dry pavement.
Most cars can stop from 60 mph in about 100 feet or so. If the relationship is linear then a car should stop from 30 mph in about 50 feet.
135/170
The stopping distance at 40 mph typically includes the reaction distance and braking distance. On average, the total stopping distance can be around 118 feet (approximately 36 meters) under ideal conditions. The reaction distance (the distance traveled during the driver's reaction time) is about 44 feet, while the braking distance is roughly 74 feet. Factors like road conditions, vehicle type, and driver alertness can significantly affect these distances.
The stopping distance, after decelerating from 60 mph to 0 mph, will depend on the efficiency of the brakes, the friction between the tyres and the road surface and the mass of the vehicle.The initial speed alone cannot give you an answer.
Thinking distance is the distance a vehicle travels while the driver reacts to a stimulus, typically calculated as a function of speed; for example, at 20 mph it's about 6 feet, at 30 mph it's around 9 feet, at 40 mph it's approximately 12 feet, at 50 mph it's about 15 feet, and at 60 mph it's roughly 18 feet. Braking distance, which is the distance required to stop once brakes are applied, increases significantly with speed; at 20 mph it's around 20 feet, at 30 mph it's about 45 feet, at 40 mph it's approximately 80 feet, at 50 mph it's about 125 feet, and at 60 mph it's roughly 180 feet. Together, thinking and braking distances contribute to the overall stopping distance, which increases with speed.
Stopping distance at 30mph = 23m
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.
Stopping Distance = about 315 feet at 70 mph
23 meters in normal conditions
Stopping Distance = 15 feet
The total stopping distance for a car travelling at 30 mph on a dry surface is about 75 feet. However, you may wish to note that in most countries, driving a car on the pavement is illegal.
Stopping distance at 40mph = 36m
Stopping Distance = about 146.25 feet.
1/2
1/2 mile
Most cars can stop from 60 mph in about 100 feet or so. If the relationship is linear then a car should stop from 30 mph in about 50 feet.
There isn't a direct linear relationship between speed and stopping distance with locked brakes. The stopping distance increases exponentially with speed due to factors like increased kinetic energy and reduced tire grip at higher speeds. It's not accurate to calculate the stopping distance at 90 mph just by extrapolating from the data given for 30 mph. Specialized calculations or tests are needed to determine the stopping distance at 90 mph.