An aircraft has a liftoff speed of 33 m/s. what minimum constant acceleration does this require if the aircraft is to be airborne after a take-off run of 240m? show work.

We will use simple formula for velocity with constant acceleration.
and formula for path 
where:
v0 - initial velocity
a - constant acceleration
t- time
x - path
x0 - initial position
v0, and x0 are equal to 0 in this case, so we can simplify our formula to
and 
We can modify first formula to get time
and substitute it to second formula.
 
Now we can find acceleration
m/s