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 ?