A car is travelling at 23.4m/s to the right when the driver puts on the brakes. The car has an acceleration of -4.50m/s^2 while the brakes are acting.

Question

(a) How long does it take to bring the car to a stop?
(b) Calculate the displacement of the car.

Answer 1

v = Vi + a t
0 = 23.4 - 4.50 t
t = 23.4/4.50

x = average speed * t
= (23.4/2) t