Question

A driver in a car, originally moving at 13.1 m/s, applies the brakes until the car comes to a stop. The car moves a distance of 34.1 m while braking. How much time did it take for the car to stop? Assume constant acceleration during braking.

Answer 1

the average velocity during braking
... (13.1 + 0) / 2

divide the stopping distance by the average velocity to find the time