an aeroplane taxis onto the runway going at 10m/s if it can accelerate steadily at 3m/s^2 and its take off speed is 90m/s what length of runway will it need?

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  1. v = 10+at
    so use that to find the time
    s = 10t + 1/2 at^2
    so use that time to calculate the distance needed

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