An aircraft accelerates constantly from rest to 75 m/s in 30 seconds. In an emergency, it decelerates constantly at (5 ext{ m/s}^2) until it stops.
Calculate the acceleration during the first 30 seconds.[1]
Find the time taken to decelerate from 75 m/s to rest.[1]
Sketch the distance–time graph of the entire journey until rest, clearly indicating the distance travelled.[2]
For safety, the take-off decision speed (V_1) is the greatest speed the aircraft may reach before emergency deceleration while still stopping within the runway.
If the aircraft is travelling at 70 m/s, determine whether it can decelerate safely on a 1600 m runway, using the same acceleration and deceleration.[4]
If the runway is wet, explain what happens to (V_1).[1]