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groxx7778dYeah, in proper conditions you can slide for hundreds of feet from only like 10mph. Really gets the heart racing when there's an intersection coming up and you thought you were being careful, but then you discover that friction broke since the last time you used it.
Though the mass of the car does not go into the equation. I could actually calculate the friction coefficient if you either gave how much time it took from 50 to 40, or what way you made during that time.
I learned from a coworker that some lady did a Dukes of Hazard style leap with her car about 45 minutes previous to my passing through that area. She spun around 180 and was going 70mph backwards. She hit a snow pile and launched air born. She landed on top of another snow pile. She was okay, but I bet she needed to change her shorts. She was going southbound and nearly went into the northbound lanes during this. She is very lucky how her flight ended.
@Demolishun Let's say v is the speed, t is time, a acceleration, and g is the earth's gravity acceleration.
v1 = 50mph = 80km/h = 22.2m/s
v2 = 40mph = 64km/h = 17.8m/s
Since a = dv/dt, and assuming constant deceleration, we have:
a = (22.2m/s - 17.8m/s)/5s = 0.88 m/s^2.
Given that g = 9.81m/s^2, the friction coefficient is:
µ = a / g = 0.09.
That would be a typical range for ice on the road, i.e. "really fucking slick".
Pardon my first attempt of this shitty meme.
Winter tires: exist