The brakes on your automobile are capable of creating a deceleration of 5.5 m/s2.

The brakes on your automobile are capable of creating a deceleration of 5.5 m/s2. If you are going 143 km/h and suddenly see a state trooper, what is the minimum time in which you can get your car under the 96 km/h speed limit? (The answer reveals the futility of braking to keep your high speed from being detected with a radar or laser gun.)