A Cessna aircraft has a lift-off speed of 120 km/h. What minimun constant accelerration does the aircraft?

Question

require is the aircraft is to be airborne after a takoff run of 200m? answer is 2.78 m/s^2
Now How long does it take the aircraft to become airborne?

Answer 1

given v = 120000/3600 = 33.333 m/s
t = 2x/v = 12.000 s
a = v/t = 2.778 m/s^2