# Physics (As Level) 12 Grade

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2) An aircraft lands on a runway at a speed of 40 meters per second (ms^-1) and brakes to a halt in a distance of 860m. Calculate a) The Braking time. B) The deceleration of the aircraft.

• Physics (As Level) 12 Grade -

a=v²/2s
v= v₀-at
v=0
t= v₀/a

• Physics (As Level) 12 Grade -

Not really helping much. A slightly worked example would be effective. But thanks anyway.

• Physics (As Level) 12 Grade -

a=v²/2s = 40²/2•860=0.93 m/s²
v= v₀-at
v=0
t= v₀/a =40/0.93 =43.01 s.

• Physics (As Level) 12 Grade -

Yes, thank you. I worked it out, after a few minutes. Anyway, thank's a lot :)

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