Acertain aircraft has a liftoff speed of 127 km/h. (a) what minimum constant acceleration does the aircraft require if it is to be airborne after a takeoff run of 277 m?

Let us write down the equation of traveled distance for the uniformly accelerated motion:

In our case . We assume that plane started accelerating from rest.
We then get this equation:

Now we also know the final velocity of a plane:

We can now solve our problem using those two equations:

When we plug in the number we get .

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Velocity is the speed of an object in a certain direction so you'd need to know speed and direction