Astudent is driving to school on a road with a speed limit of 40mph (17.9 m/s). a stoplight ahead of her turns yellow, so she begins to slow down to come to a stop. on a dry day, she is able to make her car slow down with an acceleration of magnitude of 8.8 m/s^2. however, if the road is wet, she can only manage an acceleration with a magnitude 3.9 m/s^2. part a:
on a dry day, how far (in meters) from the intersection would the student need to start braking in order to stop in time?
part b:
if it were raining instead, how far (in meters) from the intersection would the student need to start braking?