a driver brings a car to a stop by braking as hard as possible, the
stopping distance can be regarded as the sum of two distances:
"reaction distance", which is initial speed times reaction time, and "braking distance," which is the distance covered during braking.
The following table gives typical values of these:
|Initial speed (m/s)||Reaction distance (m)||Braking distance (m)||Stopping distance (m)|
What reaction time is the driver assumed to have?
(b) What is the car's stopping distance if the initial speed is 251 m/s?