Question

The driver of a car traveling down the interstate slams on the brakes causing the car to skid to rest over a distance of 154.6 M. If the car experienced and acceleration of -3.72M/S to the second during this time how long did it take for the car to come to rest

Answer 1

The time is

$$t=\sqrt{2d/a},\\\space\\ t=\sqrt{2·154.6/3.72}=9.1\text{ s}.$$