Answer:
Mininmum acceleration required = 
Explanation:
Given,
Lift off speed = 125km/hr.
We know km/hr conversion factor to m/s is
,
Therefore,
Lift off speed required =
m/s
Lift off speed required = 34.72222 m/s
Length of Takeoff Run given = 220 m.
So,
the flight needs to achieve its takeoff speed at a constant acceleration before it reaches the end of the 220 m runway.
Consider the formula from kinematics,
,
where,
v - final velocity of particle,
u - initial velocity of particle
a - the constant acceleration at which the particle is moving with
s - distance travelled by particle
So at minimum acceleration,it reaches the takeoff speed at the end of the runway.
Therefore in the formula,
we use, v = Lift off speed = 34.72222 m/s;
u = 0 m/s (plane starts from rest);
a = minimum acceleration of the plane
s = 220 m;
Substituting these values in the formula, we get,

a = 
a =
.
Therefore,the minimum acceleration of the plane required =
.