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17 July, 06:41

A skateboarder has an acceleration of - 1.9 m/s2. If her initial speed is 6 m/s how long does it take her to stop?

A. 4.1s

B. 3.2s

C. 0.32s

D. 2.1s

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Answers (1)
  1. 17 July, 06:59
    0
    Intial speed = 6m/s

    final speed = 0 m/s as it stop

    acceleration = 1.9 m/s2

    time taken = t s

    v=u+at

    0=6+1.9*t

    t=3.15 s = 3.2 s
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