A driver brings a car to a full stop in 2.0 s. If the car was initially traveling at 22 m/s, how far did the car travel during breaking?

Question

A driver brings a car to a full stop in 2.0 s. If the car was initially traveling at 22 m/s, how far did the car travel during breaking?

Answer 1

If the deceleration is constant, the average velocity is the initial velocity minus the final velocity divided by two (22 - 0)/2 = 11 m/s. The distance travelled is the average velocity times the time or 11 m/s x 2 s = 22 m.