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Stopping distances are measured in feet not in seconds. At 40 mph you're traveling 58.7 feet per second. The average driver reaction time is about 3/4 second which equates to 44 feet. After applying the brakes it will take approximately 82 feet to stop the vehicle. The total stopping distance for a car traveling 40 mph will be 126 feet when you include reaction time and actual stopping distance of the vehicle. If you divide 126' x 58.7' which is the distance traveled per second you get 2.14 seconds. This is assuming you're paying attention and have average reaction time while driving.
It will have travelled 4*60 = 240 miles
No, they have different meanings.Following distance is the safe distance to follow behind a moving motor vehicle.Stopping distance is the combination of the drivers reaction time to apply the brakes and the time the vehicle takes to come to a halt.
About 6.24 seconds at 45mph to travel 412 feet.
0.5*0.24*72 = 5.88 units of distance per second.
3 seconds
8 seconds
two
4
a driver behind your vehicle is trying to pass you
What is following distance? Following distance is the space between your vehicle and the vehicle in front of you while driving. It's important for all drivers to maintain a safe following distance, so that they have time to safely stop in case the vehicle in front of them brakes abruptly.
4 sec
3 seconds
In any driving location, it is generally agreed to be safe if you position yourself 3 seconds or more behind the vehicle in front of you.
The safe following distance is one car length for each 10 miles per hour. If you are traveling at 40 mph, one should allow a minimum of 4 car lengths between you and the traveling object in front of you. Allow more room for a motorcycle in case they wipe out (fall and crash) in front of you.
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.
One car length for every 10 miles per hour of speed. If you are then traveling at 50 mph, one should allow at least 5 car lengths between you and the car in front of you.