[–] matthew-- 0 points 1 point 1 point (+1|-0) ago
It depends on the time difference between the two points. If it's only half a meter, then it's not too far off.
There are also simple empirical formulas for estimating this stuff. At least, there are for aircraft.
But yes, the braking is not linear.
[–] 15422299? ago
It's definitely close enough over the few feet involved. Either way even if it wasn't a good fit it's good enough to show he was trying to stop.