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r-soy
r-soy is offline
#1
May29-10, 11:09 AM
P: 159
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 ?
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