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21 August, 20:39

14. A motorcycle accelerates at a rate of 4.21 m/s2

If the cyclist went from 8.2 m/s to 55.9 m/s,

how long did he accelerate?

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  1. 21 August, 20:59
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    Acceleration is change in velocity over change in time.

    a = Δv / Δt

    4.21 m/s² = (55.9 m/s - 8.2 m/s) / Δt

    Δt = 11.3 s

    Round as needed.
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