A motorist travelling at the legal speed limit of 28 m s–1 (60 mph) takes his foot off the accelerator as he passes a sign showing that the speed limit is reduced to 14 m s–1 (30 mph). The car decelerates at 2.0 m s–2.
(a) For what time interval is the motorist exceeding the speed limit? [2]
(b) How far does the car travel in that time? [2]
