posted by Sue .
Suppose that a senior driving a Pontiac zooms out of a darkened tunnel at 31.0 m/s. She is momentarily blinded by the sunshine. When she recovers, she sees that she is fast overtaking a bus ahead in her lane moving at the slower speed of 15.7 m/s. She hits the brakes as fast as she can (her reaction time is 0.40 s). If she can decelerate at 2.5 m/s2, what is the minimum distance between the driver and the bus when she first sees it so that they do not collide?