Hi all who I can find the displacement in this Q ? A jetliner lands with a speed of 90 m/s on runway . It runs with constant speed for 2 s , before the brakes are applied . The brakes produce a deceleration of 20 m/s2 . What is its displacement on the runway . I try to solve V0 = 90 m/s t1 = 2s x = V0 X t1 = 180 m a = -20 m/s2 then I don't know who I complte it ?