Converting 70mph brake distance to 60mph?

[Syringer]

I never really understand a car's braking ability to stop from 70mph as much as if it's in 60mph..so is there any sort of possible conversion or trends people notice between the two?

 

[Haircut]

Kinetic energy varies as speed^2, so you can probably approximate the braking distance at 60 mph by dividing the distance at 70 mph by (70/60)^2

This won't be exact, but it should give you some idea.

 

[StageLeft]

If your 60-0 braking distance is 118 feet and at 120 feet you happen to stop short of a 5 foot thick brick wall you can assume that 70-0, and in fact 80-0 both are 120 feet

 

[Adul]

Originally posted by: Skoorb
If your 60-0 braking distance is 118 feet and at 120 feet you happen to stop short of a 5 foot thick brick wall you can assume that 70-0, and in fact 80-0 both are 120 feet

I like that reasoning

 

[Viper GTS]

Multiply by .735.

I make no promises as to the accuracy of the above information.

Viper GTS