help

[broken gorge]

The word means deceleration, and all you have to do is first change the velocity from kmh^-1 to ms^-1, then make the acceleration a = -3, the initial velocity the velocity that you calculated, v = 0 as it's a plane touching a runway (so it needs to stop at the end otherwise it's not a good runway), and find s

Using suvat

[broken gorge]

You have a, v, u and s so v^2 = u^2 + 2as

Im guessing you're using F = ma, breaking force is equal to the mass of 150 tonnes multiplied by the deceleration