The takeoff speed for an Airbus A320 jetliner is 74m/s . Velocity data measured

Question

The takeoff speed for an Airbus A320 jetliner is 74m/s . Velocity data measured during takeoff are as follows:

t (s) vx (m/s)

0 0

10 26

20 52   

30 78

What is the jetliner's acceleration during takeoff, in m/s2?

Express your answer using two significant figures.

What is the jetliner's acceleration during takeoff, in g's?

Express your answer using two significant figures.

At what time do the wheels leave the ground?

Express your answer using two significant figures.

For safety reasons, in case of an aborted takeoff, the length of the runway must be three times the takeoff distance. What is the minimum length runway this aircraft can use?

Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

v-u=at ;26-0=10a;a=2.6m/sec^2. ans

acc remains constant 2.6/9.8 = 0.26531g~0.26g ans

distance travelled for take off at 74m/sec

v^2=u^2 +2as; 74*74=0+2*2.6s; s =1053.07m

aborted take off velocity must be less than 74m/sec

safety 3*s=3159.23m ans

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