Police find skid marks 180 meters long on a highway where a car made an emergency stop. Assuming that the deceleration was a = 10 m/s¶ (about the maximum for dry pavement), how fast was the car traveling before the brakes were applied?

Answer 1

s=(v₀²-v²)/2a
v= sqrt{ v₀²-2as}

Answer 2

klyo