40 mph = 40 miles in 60 minutes = 20 miles in 30 minutes.
Just divide the distance by the speed.
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.
Distance = Rate * Time or, for our purpose Time = Distance/Rate at 50 mph Time = 4.5 miles/50 mph = 0.09 hours = 5.4 minutes ----------------------------- at 40 mph Time = 4.5 miles/40 mph = 0.1125 hours = 6.75 minutes ---------------------------------------------------- 6.75 - 5.4 = 1.35 minutes saved
Approximately 1 hour 40 minutes
Stopping distance at 40mph = 36m
At 20 mph, the average thinking distance is around 20 feet, while the braking distance is approximately 20 feet as well. Therefore, the overall stopping distance for a vehicle traveling at 20 mph would be around 40 feet.
85 feet
The vehicle's reaction distance depends on the driver's reaction time.
using the formula, speed squared divided by 20 plus speed gives 40 feet approximate stopping distance at 20mph.
It depends on the car's stopping power. An average distance for 40 mph would be around 85 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.
Using a formula for stopping distances I found online it should be 206.25 feet. Hope this helps! 20 mph x 2 = 40 ft 30 x 2.5 = 75 40 x 3 = 120 50 x 3.5 = 175 60 x 4 =240 70 x 4.5 = 315
These are the old British measures which haven't changed since th 1960's. In modern vehicles far shorter stopping distances can be obtained. Speed thinking stopping 20 mph 6 metres 6 metres 30 mph 9 metres 14 metres 40 mph 12 metres 24 metres 50 mph 15 metres 38 metres 60 mph 18 metres 55 metres 70 mph 21 metres 75 metres Soure :- The highway code 1998
40 mph = 40 miles in 60 minutes = 20 miles in 30 minutes.
Assuming that the horse was travelling at 40 mph the entire time it would take him or her 3 hours and 45 minutes.
Just divide the distance by the speed.